When it comes to the race for the Democratic presidential nomination, national polls show Hillary Clinton with a significant lead. In New Hampshire, the latest CNN/WMUR poll showed Clinton way out in front with 43% support, followed by Barack Obama with 20%, and John Edwards with 12%. (It's worth noting that 55% of poll respondents are still "trying to decide" which presidential candidate to support.)

But what about Iowa, which has consistently been the closest contest? A just-released Newsweek poll is bound to get some attention.

Among all Iowa Democratic voters, Clinton draws 31 percent, followed by Obama (25 percent) and Edwards (21 percent). But among likely caucus-goers, Obama enjoys a slim lead, polling 28 percent to best Clinton (24 percent) and Edwards (22 percent). Bill Richardson is the only other Democratic candidate to score in the double digits (10 percent).

Stay tuned.