Vulnerable Dem Pryor hits GOP opponent quick with first ad

Sen. Mark Pryor (D-Ark.) is up with his first ad against Rep. Tom Cotton (R-Ark.), blasting the congressman for his political ambition and voting record as Cotton prepares to jump into the race.

Pryor, considered the most vulnerable Democratic incumbent running for reelection in 2014, attacked Cotton on several issues, including his vote against the farm bill.

"Tom Cotton is now running for the Unites States Senate, running for another office just seven months after being sworn into Congress," the ad says before hitting the freshman congressman for voting against the farm bill, the Violence Against Women Act and a bipartisan student loan agreement, as well as his views on Medicare and Social Security.

"Tom Cotton should be running. Not for higher office, but running from his own record of hurting the people of Arkansas," the ad concludes.

Pryor is one of three Democratic incumbents the GOP hopes to take out in 2014. Republicans need to win six seats to take the Senate's majority, and they believe they have a good chance of winning three open seats.

Pryor's advertisement is running for two days and is timed to coincide with Cotton's jump into the Senate race, scheduled for Tuesday evening.