Rep. Jim Cooper (D-Tenn.) on Tuesday became the 29th House Democrat to announce he’s not seeking re-election. Cooper, 67, has represented Tennessee’s 5th Congressional District since 2003 and spent an earlier stint in Congress representing a different district from 1983 to 1995. Cooper blamed redistricting for his decision to retire. “Despite my strength at the polls, I could not stop the General Assembly from dismembering Nashville. No one tried harder to keep our city whole. I explored every possible way, including lawsuits, to stop the gerrymandering and to win one of the three new congressional districts that now divide Nashville. There’s no way, at least for me in this election cycle, but there may be a path for other worthy candidates,” he said in a statement. “I am announcing my decision promptly so that others have more time to campaign. I will return the individual contributions that I have received …