Exclusive poll: GOP Senate seats threatened in Arizona, Nevada
Democrats have a real shot at winning two of the three Senate seats where Republicans are most vulnerable in the midterm elections, according to a new Axios/SurveyMonkey poll.
The bottom line: The poll provides new evidence that Republicans' hold on the Senate may not be as solid as it once looked. Democrats could win the open Arizona seat and possibly defeat Republican incumbent Dean Heller in Nevada. The third race, in Tennessee, is a statistical tie.