Gardner also looked to link Udall to President Obama and ObamaCare.
Sen. Mark Pryor (D-Ark.) held an 11-point lead over Rep. Tom Cotton in May.
Udall garnered 48 percent of registered voters in a new poll, while Gardner took 40 percent.
McConnell has 47 percent of support from likely voters, according to a new poll.
Sen. Pat Roberts touted his experience; opponent Greg Orman claimed his independence.
The Republican's decision could muddle a major line of attack for Sen. Mark Pryor (D-Ark.).
Democrat's Virginia Tech-themed ad features his work to get the school into the ACC.
Maryland officials are looking into Alaska Senate candidate Dan Sullivan's old home on the East Coast.
The head of Alaska Democratic Party is asking Maryland authorities to look into whether he improperly claimed tax breaks on a...
The former president will headline a Chapel Hill lunch fundraiser for the vulnerable N.C. Democrat on Sept. 30.
The CNN survey gives Rep. Tom Cotton an edge of 49 to 47 percent over Sen. Mark Pryor.