Many have opined, and I agree, that taking the US Senate is as important as the presidency next year. A couple of times someone here has asked if we have candidates for all the seats and I almost put this information in a comment in response. However, that comment would end up too long and a bit off topic so here is a diary instead. Almost all of what follows comes from Politics1.com. Italicized names are undeclared potential candidates, though in my experience Politics1 sometimes lists potential candidates on the flimsiest of gossip or speculation. Websites are linked where available. Please forgive formatting inconsistencies which arose from the copy/paste process and I could not figure out how to fix. Please feel free to use this as a semi-open thread regarding your favorite 2020 US Senate races or candidates, or to add any names I may have missed.
ALABAMA
Doug Jones (D)* - (Campaign Site)
John Rogers (D) - State Rep., College Administrator & USAF Veteran
ALASKA (incumbent Dan Sullivan)
Val Davidson (D) - Ex-Lt Governor, Ex-State Health Commissioner & Attorney
ARIZONA (incumbent Martha McSally)
Chris Deschene (D) - Ex-State Rep, Engineer, Attorney, USMC Veteran & ''10 Sec of State Nominee
Mark Kelly (D) - Retired Astronaut, Retired Navy Officer, Businessman & Gun Control Activist
Juan Vasquez (D) - Physician
ARKANSAS (incumbent Tom Cotton)
Josh Mahony (D) - Nonprofit Group Executive & '18 US Rep Nominee
COLORADO (incumbent Cory Gardner)
Dan Baer (D) - Ex-US Ambassador & Ex-Depy Asst US Secretary of State
Diana Bray (D) - Psychologist & Envinronmental Activist
Ellen Burnes (D) - College Professor, Economist & Ex-Boulder County Democratic Chair
Kerry Donovan (D) - State Sen.
Lorena Garcia (D) - Nonprofit Group Executive
Stan Garnett (D) - Ex-Boulder County District Attorney
Jena Griswold (D) - Secretary of State & Attorney
Mike Johnston (D) - Ex-State Sen., Businessman & Ex-High School Principal & '18 Gov Candidate
Dustin Leitzel (D) - Critical Care Pharmacist
Alice Madden (D) - Ex-State House Majority Leader, Attorney, University Official & Ex-Gubernatorial Aide
Andrew Romanoff (D) - Ex-State House Speaker, Attorney, '10 Candidate & '14 US Rep Candidate
Joe Salazar (D) - Ex-State Rep., Attorney & '18 Atty Gen Candidate
Stephany Rose Spaulding (D) - Baptist Minister, College Professor & '18 US Rep Nominee
John Walsh (D) - Ex-US Attorney
Angela Williams (D) - State Sen., Ex-State Rep & Insurance Agency Owner
Trish Zornio (D) - Research Scientist
DELAWARE
Chris Coons (D)* - (Campaign Site) - no GOP challenger listed
GEORGIA (incumbent David Perdue)
Sarah Riggs Amico (D) - Businesswoman & '18 Lt Gov Nominee
Akhenaten Amun (D) - Teacher & '18 Lt Gov Candidate
Jason Carter (D) - Ex-State Sen, Attorney, Grandson of Pres Carter & '14 Gov Nominee
Marckeith DeJesus (D) - Financial Consultant, '16 St Rep Candidate & '17 St Sen Candidate
Scott Holcomb (D) - State Rep., Attorney & Army Veteran
Jon Ossoff (D) - Investigative Journalist & '17 US Rep Nominee
Teresa Tomlinson (D) - Ex-Columbus Mayor & Attorney
Raphael Warnock (D) - Pastor & Civil Rights Activist
Elaine Whigham Williams (D) - Pastor & '16 Pres Candidate
IDAHO (incumbent Jim Risch)
Nancy Harris (D) - Businesswoman & Liberal Activist
ILLINOIS
Dick Durbin (D)* - (Campaign Site)
IOWA (incumbent Joni Ernst)
Kimberly Graham (D) - Attorney
Theresa Greenfield (D) - Real Estate Executive & '18 US Rep Candidate
Eddie Mauro (D) - Insurance Broker, Community Activist & '18 US Rep Candidate
Stacey Walker (D) - Linn County Supervisor & Ex-Nonprofit Group Executive
KANSAS (Pat Roberts is retiring.)
Nancy Boyda (D) - Ex-Congresswoman & Retired Pharmaceutical Researcher
Sharice Davids (D) - Congresswoman & Attorney
Barry Grissom (D) - Ex-US Attorney
Sarah Smarsh (D) - Journalist & Author
Adam Smith (D)
Robert Tillman (D) - Retired Court Services Officer, National Guard Veteran & Frequent Candidate
Brent Welder (D) - Attorney, Ex-Political Organizer & Sanders Campaign Activist & '18 US Rep Candidate
KENTUCKY (incumbent Mitch McConnell)
Jimmy Ausbrooks (D) - Educator & LGBT Counselor
Steven Cox (D) - Drugstore Manager
Kevin Elliott (D)
Greg Fischer (D) - Louisville Mayor & Businessman
Jim Gray (D) - Ex-Lexington Mayor, Businessman, '16 Nominee & '18 US Rep Candidate
Matt Jones (D) - Sports Radio Show Host
Andrew Maynard (D)
Amy McGrath (D) - Retired USMC Lt Col, Iraq/Afghan War Veteran & '18 US Rep Nominee
LOUISIANA (incumbent Bill Cassidy)
Antoine Pierce (D) - Community Activist, '16 Baton Rouge Council Candidate & '15 St Rep Candidate
MAINE (incumbent Susan Collins)
Shenna Bellows (D) - State Sen, Ex-ACLU State Exec Director & '14 Nominee
Seth Berry (D) - State Rep., Ex-House Majority Leader, Businessman & Ex-Teacher
Michael Bunker (D) - Travel Agent
Matt Dunlap (D) - Secretary of State, Ex-State Rep, Ex-Teacher & '12 Candidate
Sara Gideon (D) - House Speaker, Ex-Freeport Town Councilwoman & Advertising Sales Executive
Jim Howaniec (D) - Ex-Lewiston Mayor, Attorney & '94 US Rep Candidate
Bre "Bee Kay" Kidman (D) - Attorney & LGBT Rights Activist
Daniel Kleban (D) - Brewery Owner
Cecile Richards (D) - Ex-Planned Parenthood President
Zak Ringelstein (D) - Teacher, Businessman & '18 Nomnee
Rosa Scarcelli (D) - Businesswoman, Community Activist & '10 Gov Candidate
Betsy Sweet (D) - Progressive Activist, Lobbyist & '18 Gov Candidate
MASSACHUSETTS
Ed Markey (D)* - (Campaign Site)
Shannon Liss-Riordan (D) - Attorney
Juana Matias (D) - Ex-State Rep., Attorney, AmeriCorps Veteran & '18 US Rep Candidate
Steve Pemberton (D) - HR Executive & Author
Michelle Wu (D) - Boston City Councilor & Attorney
(Diarist’s note: This is my home state. Liss-Riordan is definitely campaigning. Not sure what Pemberton’s status is. I don’t expect Matias or Wu to enter the race.)
MICHIGAN
Gary Peters (D)* - (Campaign Site)
MINNESOTA
Tina Smith (DFL)* - (Campaign Site)
MISSISSIPPI (incumbent Cindy Hyde-Smith)
Jensen Bohren (D) - Retail Employee, Sanders Campaign Activist & '18 Candidate
Mike Espy (D) - Ex-US Agriculture Secretary, Ex-Congressman, Attorney & '18 Nominee
MONTANA (incumbent Steve Daines)
Wilmot Collins (D) - Helena Mayor & Navy Veteran
Linda McCulloch (D) - Ex-Sec of State & Ex-State Superintendent of Public Instruction
Angela McLean (D) - Ex-Lt Gov, Ex-State Board of Regents Chair & Educator
Michael Punke (D) - Ex-US Ambassador & Novelist
NEBRASKA (incumbent Ben Sasse)
Chris Beutler (D) - Lincoln Mayor, Ex-State Sen, Attorney & Army Veteran
Sara Howard (D) - State Sen. & Attorney
Chris Janicek (D) - Bakery Owner & '18 Candidate
NEW HAMPSHIRE
Jeanne Shaheen (D)* - (Campaign Site)
NEW JERSEY
Cory Booker (D)* - (Campaign Site); also running for President
Lisa McCormick (D) - Businesswoman, Progressive Activist & '18 Candidate
NEW MEXICO (Tom Udall is retiring.)
Giovanni Haqani (D) - Policy Analyst, Author & '18 State Rep Nominee
Ben Ray Lujan (D) - Congressman & Ex-State Public Regulation Commissioner
Maggie Toulouse Oliver (D) - Secretary of State & Ex-Bernalillo County Clerk
NORTH CAROLINA (incumbent Thom Tillis)
Janet Cowell (D) - Ex-State Treasurer, Ex-State Sen. & Ex-Raleigh City Councilwoman
Cal Cunningham (D) - Ex-State Sen, Attorney, Iraq War Veteran & Candidate
Trevor Fuller (D) - Charlotte, Mecklenburg County Commissioner & Attorney
Jeff Jackson (D) - State Sen, National Guard Officer, Afghan War Veteran & Attorney
Eric Mansfield (D) - Ex-State Sen., Physician, Minister, Army Veteran & '12 Lt Gov Candidate
Richard Moore (D) - Ex-State Treasurer, Ex-State Rep., Banker, Attorney & '08 Gov Candidate
Deborah Ross (D) - Ex-State Rep., Attorney & '16 Nominee
Erica Smith (D) - State Sen., Ex-School Board Member, Pastor & Mechanical Engineer
OKLAHOMA — RED ALERT! NO DEM LISTED TO CHALLENGE JIM INHOFE IN 2020!
OREGON
Jeff Merkley (D)* - (Campaign Site)
RHODE ISLAND
Jack Reed (D)*- (Campaign Site) — no GOP challenger listed
SOUTH CAROLINA (incumbent Lindsey Graham, with a few GOP challengers)
Matthew Knights (D) - Musician, Singer & Songwriter
Jaime Harrison (D) - Ex-State Democratic Chair, Attorney, Lobbyist & Ex-Congressional Aide
William Stone (D) - Attorney
Gloria Bromell Tinubu (D) - Ex-State Rep, Ex-College Pres, Economist & Frequent Candidate
Justin Wooten (D)
SOUTH DAKOTA — RED ALERT! NO DEM LISTED TO CHALLENGE MIKE ROUNDS IN 2020!
TENNESSEE (Lamar Alexander is retiring.)
James Mackler (D) - Attorney, Air National Guard Officer & Iraq War Veteran
Jeff Yarbro (D) - State Sen. & Attorney
TEXAS (incumbent John Cornyn)
Rafael Anchia (D) - State Rep.
Chris Bell (D) - Ex-Congressman, Ex-Houston City Councilman, Attorney & Frequent Candidate
Michael Cooper (D) - Pastor, Civil Rights Activist & '18 Lt Gov Candidate
Amanda Edwards (D) - Houston City Councilor & Attorney
MJ Hegar (D) - Business Consultant, Afghan War Veteran, Author & '18 US Rep Nominee
Sema Hernandez (D) - Businesswoman, Sanders Campaign Activist & '18 Candidate
Clay Jenkins (D) - Dallas County Judge
Adrian Ocegueda (D) - Financial Consultant & '18 Gov Candidate
Mark Strama (D) - Ex-State Rep. & Google Executive
Royce West (D) - State Sen., Ex-State Senate President Pro Tempore & Attorney
VIRGINIA
Mark Warner (D)* - (Campaign Site)
WEST VIRGINIA (incumbent Shelley Moore Capito)
Richard Ojeda (D) - Ex-State Sen., Iraq/Afghan War Veteran & '14/'18 US Rep Candidate
Paula Jean Swearengin (D) - Environmental Activist & '18 Candidate
WYOMING (Mike Enzi is retiring.)
James Byrd (D) - Ex-State Rep., Geophysicist, Software Engineer & '18 Sec of State Nominee
Chuck Jagoda (D) - Teacher, Actor & California Resident
Yana Ludwig (D) - Community Organizer & Progressive Activist
Mary Throne (D) - Ex-State Rep., Attorney & '18 Gov Nominee
Gary Trauner (D) - Ex-Teton Co School Board Chair, Businessman & Frequent Candidate