Mitt Romney won primaries in Wisconsin, Maryland and the District of Columbia on Tuesday, but Rick Santorum has vowed to continue his now hopeless campaign through at least the end of the month. CNN: The former Massachusetts governor is expected to take the majority of Wisconsin's 42 delegates and Maryland's 37 delegates, with some designated solely for the winner and the rest to be awarded proportionally. He will take all 16 delegates at stake in the District of Columbia. Counting partial allocations for Wisconsin and Maryland, and full allocations for D.C., Romney has collected 648 delegates since the primary and caucuses began in January, according to CNN estimates. That's more than twice the 264 delegates Santorum is estimated to hold. Gingrich and Paul trailed well back. With 93% of the vote reported in Wisconsin, Romney had 42% and Santorum, a former U.S. senator from Pennsylvania, had 38%. U.S. Rep. Ron Paul of Texas had 12%, and former House Speaker Newt Gingrich...(Read Full Post)