A new poll of likely Republican caucusgoers in Iowa finds Scott Walker with a broad base of support just a week after the Wisconsin governor officially entered the presidential race. The new survey from Monmouth University finds Walker with 22 percent support, leading his closest competitor, Donald Trump, by nine points in the crowded GOP field.

The remaining candidates are polling in the single-digits, including Ben Carson at eight percent, Jeb Bush and Ted Cruz at seven percent, Mike Huckabee at six percent, Rand Paul and Marco Rubio at five percent, and Bobby Jindal at four percent. Rick Santorum, who won the 2012 Iowa caucuses, ties with Rick Perry and Carly Fiorina at 3 percent support.

The poll also asked likely caucusgoers to select a second choice, and Walker leads among the second choices too at 13 percent. His combined percentage of first and second choice is 35 percent, with Trump coming in a far second at 22 percent combined.

Iowa has become a stronghold for Walker since he wowed the crowd at a January event in Des Moines, and he has traveled to the state seven times since the beginning of the year. Walker appears to have support across ideological lines. According to Monmouth, he wins a plurality of very conservative voters (22 percent), somewhat conservative voters (23 percent), and moderate-to-liberal voters (19 percent) polled. Walker also has a very good image among Iowa Republicans, with 73 percent holding a favorable view of the governor. Just 18 percent of voters say they have no opinion of Walker, the lowest percentage among the candidates and the same percentage as Trump and Bush.

Walker also leads Trump among self-described Tea Party supporters (27 percent to 14 percent) and evangelical voters (17 percent to 13 percent). And while likely caucusgoers age 50 and over are overwhelmingly pro-Walker (25 percent), younger voters support Walker as much as Rand Paul (13 percent) and give Trump 12 percent and Ted Cruz and Marco Rubio 10 percent each.

According to the Real Clear Politics average of polls, Walker maintains a 9.4-point lead in Iowa and is in third place in national polls behind Bush and Trump.