is not nothing, whatever the national polls are:

Mitt Romney still leads in Iowa but Fred Thompson, a relative newcomer to the presidential race, has emerged as his nearest competitor in a new Des Moines Register poll of likely Republican caucus participants.
Mike Huckabee and Rudy Giuliani are in a close fight for third place in the Iowa Poll taken over three days last week.
Romney, who has campaigned more often in Iowa than his Republican rivals, is the presidential choice of 29 percent of those who say they definitely or probably will attend the leadoff caucuses.
Support for the former Massachusetts governor is essentially unchanged from an Iowa Poll taken in May, when he was the top choice of 30 percent.
There’s been a shakeup, however, in the rest of the field.
Thompson, a former Tennessee senator who officially entered the race for the Republican nomination a month ago, grabs second place in the new poll at 18 percent. The poll was conducted while he was finishing his second campaign trip to Iowa last week.