DES MOINES, Iowa — A new Iowa Poll shows national Republican presidential frontrunner Mitt Romney and Tea Party favorite Michele Bachmann leading among the state’s likely GOP caucus-goers.

The poll conducted for The Des Moines Register shows Romney, the former Massachusetts governor, with support from 23 percent in Iowa. Bachmann is right on his heels. The Minnesota representative who plans to launch her campaign in Iowa on Monday has support from 22 percent.

The results are based on telephone interviews with 400 likely Republican Iowa caucus-goers from June 19 to 22. It has a margin of error of 4.9 percentage points.

Romney has said he plans to run a scaled-down Iowa campaign, compared to the all-out, $10-million effort he waged for the 2008 caucuses.

Tim Pawlenty has been the most aggressive about campaigning in Iowa, having lined up top Iowa and national consultants, been a frequent visitor to the state and ran the 2012 campaign’s first Republican candidate TV advertisements last week.

However, only 6 percent of Iowa Republicans expected to attend the 2012 caucuses prefer him.