This tweet from St. Louis Post-Dispatch columnist Aisha Sultan is from July of 2017:
You’re reading the tweet and the timestamp correctly. At least one person who has become a citizen of this great country during the Trump era has received an official letter from the Trump Administration congratulating them on becoming a new U.S. citizen, yet the letter has the signature of former President Barack Obama on it!
I think this completely disproves the bizarre conspiracy theory about an “Obama Deep State” (although I’ve never believed in it anyways), since Trump is just too damn lazy to say anything nice about our nation’s newest citizens.