Ed Gillespie said Sen. Mark Warner (D-Va.) isn't the centrist he claims to be.
Friends and former colleagues are skeptical that she'll jump back into politics.
Illinois's Republican and Democratic senators have an unusually close relationship.
Oregon GOP Senate candidate Monica Wehby announced her first TV ad Wednesday.
The ad comes amid a burgeoning primary challenge by a Tea Party-endorsed candidate.
Obama has committed to doing at least six fundraising events for the committee this year.
The former Alaska governor will headline a “Heels on, Gloves Off!” rally.
In February, Democrats held only a 2-point lead.
A report says Kathleen Sebelius is thinking about a Senate run in Kansas.
" 'No' is the answer — plain and simple," he said on NBC.