Abortion uproar may hurt GOP bid for Senate control ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page AP Photos FLORIDA: Democratic Senator Bill Nelson (left) will face Republican Representative Connie Mack in what is expected to be one of the country’s most expensive races. AP Photos INDIANA - Democrat Joe Donnelly (left), a congressman, will face Republican Richard Mourdock, a state treasurer who defeated incumbent Senator Richard Lugar in the GOP primary. AP Photos MASSACHUSETTS - Republican incumbent Scott Brown, who won the seat in a special election two years ago, will face Elizabeth Warren in the country's most expensive Senate race. AP Photos MISSOURI - Democratic Senator Claire McCaskill will face Republican Representative Todd Akin, who made national headlines for his comments about rape. Left: Justin Sullivan/Getty Images; Right: AP Photo MONTANA - Democratic Senator Jon Tester (left) faces a considerable challenge against GOP Representative Denny Rehberg. AP Photos NEVADA - Senator Dean Heller, who took the seat after fellow Republican John Ensign resigned, is facing Democratic Representative Shelley Berkley. AP Photos NORTH DAKOTA - Republican Representative Rick Berg will face Democrat and former state attorney general Heidi Heitkamp for the seat being vacated by retiring Democratic Senator Kent Conrad. AP Photos VIRGINIA - Two former governors face off with Republican George Allen (left) and Democrat Tim Kaine. Allen is trying to regain the seat he lost six years ago to now-retiring Senator Jim Webb. AP Photos WISCONSIN - Republican former governor Tommy Thompson will go against Democratic Representative Tammy Baldwin for the Senate seat.