You've probably heard this before, but today's Republican primaries in Wisconsin, Maryland, and DC are pretty important. They'll surely push Mitt Romney past the 600 delegate mark (does that make it "halftime"?), and they represent Rick Santorum's last chance to win a Midwestern state, Politico reports. Here's what you need to know:
- Wisconsin is what matters: It doesn't award very many more delegates than Maryland, but Maryland is guaranteed to go blue in November, whereas Wisconsin is a swing state, ABC News points out.