Former congressman Leonard Boswell and current First District Rep. Bruce Braley. (file photos)

Former Iowa congressman Leonard Boswell is endorsing Democrat Bruce Braley for U.S. Senate.

Boswell used his Facebook page to endorse Braley on Monday, saying the four-term congressman has fought “passionately for Iowa’s small towns, big cities, and working families.”

Braley announced earlier this month that he’d seek the Senate seat held for decades by Democrat Tom Harkin, who won’t seek re-election. Braley also has been endorsed by Iowa Democratic Congressman Dave Loebsack.

Boswell served eight terms in Congress before being beat last November by Republican Rep. Tom Latham in the 3rd Congressional District race.