Democrats are ramping up their pressure on Massachusetts Republican Senate candidate Gabriel Gomez to release his list of clients during his time working at a private equity firm, an attempt to transform his business background into a campaign liability.

North Carolina State Speaker Thom Tillis announced Friday he's challenging Sen. Kay Hagan (D-N.C.) in 2014.

Sen. Mark Pryor (D-Ark.) defends himself from a barrage of attacks on his opposition to gun-control legislation in a new ad, the first from a Democratic senator this cycle.

The ad against the GOP's Massachusetts Senate candidate will run on the Internet radio service Pandora starting Saturday.

Voters are split on their party preference for House candidates, according to a new poll showing Democrats losing some support with the public.

Sen. Mark Warner (D-Va.) looks to have an easy path to reelection, according to a new poll that shows him leading all potential challengers by double digits.

But Republicans note Democrats are having their own trouble finding top-notch Senate talent to recruit. 

The Republican State Leadership Committee is expanding its effort to recruit diverse candidates to state elected office, aiming to recruit 200 candidates from diverse backgrounds for the upcoming cycle.

Obama told Dem donors he would be "working tirelessly" to push the party's agenda ahead of the midterm election.