5:07 PM PT: Here's a bit of good news to start the night: Democrat James Kay has won a special election in Kentucky's 56th State House District, defeating Republican Lyen Crews 44-34, despite former Democrat John-Mark Hack taking 22 percent as an independent. This represents an important hold for Democrats, who are fighting to hang on to their majority in the chamber.
5:07 PM PT: The first trickle of votes is now showing up.
5:15 PM PT: Huffington Post also has a very cool page that not only offers an interactive map, but plots results on a town-by-town basis in comparison to other recent MA-Sen elections, including Brown vs. Warren and Brown vs. Coakley.
5:19 PM PT: The first sizable chunk of votes has come in (3% of precincts total), putting Gomez up 51-48. But don't fret: Markey's still performing better than Coakley, and, for the most part, better than Warren, too.
5:24 PM PT: Up to 8% reporting now. Gomez still ahead 52-48.
5:33 PM PT: We're now at 17%, with Gomez up 52-47.
5:36 PM PT: Now it's 53-47 with 24% in, but Markey is still performing about 7 points better than Martha Coakley. So if trends hold, he'd wind up with about 54-55% of the vote.
5:42 PM PT: That's more like it: 28% reporting and it's down to 50.6 Gomez, 49 Markey.
5:46 PM PT: Looks like the fun part of the night for Gabriel Gomez is about to end: He's now up just 0.6%, or 2,000 votes, with 32% reporting.
5:49 PM PT: And there we go: Markey just retook the lead for the first time since the very first precincts started reporting. He's now up 0.2%.
5:51 PM PT: 43% reporting, Markey +1 now.
5:55 PM PT: The deep blue city of Boston is starting to chime in, putting Markey up 51-48 with 49% reporting.
5:58 PM PT: 56% reporting, Markey +4.
6:04 PM PT: Our model has remained quite stable all night, finding a swing of around or under 7% to Markey from Coakley. Coakley took 47.6% in the 2010 special, so that would give Markey around 54-55% total if things hold.
6:05 PM PT: We're up to 63% and Markey's lead keeps growing. He's now at 53-47.