Two big polls late Sunday — CNN/WMUR and USA Today/Gallup find that Barack Obama has opened a big lead over Hillary Clinton and John McCain leads Mitt Romney, although by a smaller margin.

The USA Today/Gallup survey has Obama ahead of Clinton 41 percent to 28 percent with Bill Richardson fading to 6 percent. McCain leads Romney 34 percent to 30 percent with Mike Huckabee at 13 percents and Rudy Giuliani and Ron Paul tied at 9 percent. The margin of error is 4 percent.

In the CNN/WMUR poll conducted Saturday and Sunday, Obama went from a dead heat with Clinton to a 39 percent to 29 percent lead. Edwards’ support dropped from 20 percent to 16 percent. “The Iowa caucus results have convinced growing numbers of Granite State voters that Obama can really go all the way,” CNN Polling Director Keating Holland said. Among the Republicans, McCain led Romney 32 percent to 26 percent, with Huckabee a distant third. The margin of error is 5 percent. For the full poll results, click here.

Another poll released late Sunday, by American Research Group, says McCain leads Romney with Huckabee at 12 percent. Obama leads Clinton 39 percent to 28 percent with Edwards at 20 percent. Margin of error is 4 percent.