Polls: Republicans lead in 5 key Senate races

Republicans have leads in five crucial Senate races, according to new polling conducted for the GOP-aligned group American Crossroads.

The automated surveys from Harper Polling find Sens. Mark Begich (D-Alaska), Mark Pryor (D-Ark.) and Mary Landrieu (D-La.) trailing GOP opponents, as well as Republicans holding leads in Democratic-held open seats in Montana and Michigan. Sen. Kay Hagan (D-N.C.) is tied with her most likely opponent, while Sen. Jeanne Shaheen (D-N.H.) has a lead in her race.

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