NASHVILLE (AP) - U.S. Sen. Lamar Alexander's campaign says it raised nearly $770,000 in the fourth quarter and that it ended the year with $3.2 million on hand.

Alexander, a former Tennessee governor, is running for a third term in the Senate. He raised a total of about $4.7 million in 2013, and his minute-long television ads have been in heavy rotation around the state.

Alexander is being challenged in the Republican primary by state Rep. Joe Carr of Murfreesboro, who said he raised $250,000 in the fourth quarter, after raising just $52,000 in the previous reporting period.

Carr, who in August dropped a congressional bid to instead challenge Alexander, raised about $609,000 in 2013 and had $405,000 remaining at the end of the quarter.