Rick Santorum won the Louisiana Republican presidential primary on Saturday, adding an 11th state to his total.

Florida’s Republicans vote tonight in a high-stakes presidential primary election with Mitt Romney holding a double-digit lead over Newt Gingrich.

Republican Mitt Romney has fended off a few attacks on his business record and sailed through a high-stakes debate that his rivals used to jockey for.

Republican Scott Brown won a bitter US Senate race in Massachusetts on Tuesday, dealing a blow to President Barack Obama’s legislative agenda.