CBS News projects Mitt Romney the winner of today's Republican caucuses in Maine. With 502 precincts reporting (of 600), Romney has received 2,190 votes, or 39 percent.  Ron Paul appears to have come in second, with 1,996 votes, or 36 percent of the vote. Rick Santorum has so far received 989 votes, or 18 percent. At this point, Newt Gingrich has finished last, with 349 votes, or 6 percent of the votes cast.