Today's WNBC/Marist poll finds both Hillary Clinton and John McCain with double-digit leads over their opponents in the Feb. 5 New York primaries. Clinton crossed the 50 percent mark, with 54 percent of likely Democratic voters, including leaners, saying they will vote for her. Barack Obama gets 398 percent, and 8 percent are undecided. Seventy-eight percent of Democrats said they strongly support their candidate, and 79 percent of Clinton's backers are strongly committed to her, compared to 76 percent of Obama's supporters. On the GOP side, John McCain is leading Mitt Romney among Republicans likely to vote Tuesday, including leaners, 61-24. Mike Huckabee and Ron Paul are in the single digits. A majority of New York Republicans, 51 percent, think Rudy Giuliani's endorsement of McCain helps the Arizona senator. Three in 10 said they don't care that The Times has endorsed McCain, but 42 percent said the paper's backing makes them less likely to support him.