Former Gov. Mitt Romney (R-Mass.) on Wednesday promoted a round of Republican victories in last night's elections in a letter to supporters. The 2012 presidential hopeful plugged the triumphs of Republican gubernatorial candidates Bob McDonnell (Va.) and Chris Christie (N.J.), emphasizing that his political action committee's endorsement and campaign work for the two candidates. "It's exhilarating to wake up to headlines of conservative victories in the battleground elections in Virginia and New Jersey," Romney wrote. "The American people have sent a very strong message to the liberals in Washington, DC that big government is not the answer, and that conservatism...