Gov. Bobby Jindal draws the support of 8 percent of likely Republican caucusgoers in Iowa, according to a recent internal poll by his 2016 presidential campaign — a rate twice that of his best showing in independent surveys.

The poll result put Jindal in a tie for fourth in the crowded Republican field. Wisconsin Gov. Scott Walker ran first, at 23 percent, followed by real-estate developer and reality-TV celebrity Donald Trump, at 13 percent, and former Florida Gov. Jeb Bush, at 9 percent. Next came Jindal, in a tie with retired neurosurgeon Ben Carson.

The Feb. 1 caucuses kick off the official nomination selection process, and Jindal has campaigned heavily in Iowa since announcing his candidacy June 24. He also visited the state repeatedly in the months before then. A two-term governor, he is barred by state law from seeking a third term this fall.

Jindal’s best performance in an independent poll is the 4 percent he registered in a survey by Monmouth University, conducted July 16-19. That poll, also aimed at likely Republican caucusgoers, showed similar results for Walker (22 percent), Trump (13 percent), Bush (7 percent) and Carson (8 percent), compared with the Jindal campaign’s numbers.

The Jindal poll was conducted July 19-21 by OnMessage Inc., the Virginia political consulting firm long associated with Jindal. OnMessage contacted 600 Republicans by telephone, with just less than one-fifth of those reached on their cellphones, for live interviews. The poll’s margin of error is 4 percent.

The Jindal campaign also touted Jindal’s strong favorability rating among those surveyed, with a favorable-unfavorable score of 70-10. A Quinnipiac University poll of 350 registered Republican voters in Iowa, conducted July 9-20 and released Wednesday, showed him with a 51-7 favorable-unfavorable rating.

“Bottom line, Gov. Jindal has taken off in Iowa,” Wes Anderson, of OnMessage, wrote in an announcement of the Jindal campaign’s survey results. “No other candidate has seen as much positive movement as Jindal.”

Jindal, 44, has fared less well in national polls, consistently scoring in the low single digits and ranking outside the top 10. Fox News has said it will use national polls to select the top 10 candidates to appear in a live debate at 9 p.m. Aug. 6 — the first nationwide TV debate of the campaign. Those candidates who miss the prime-time cut will be eligible to participate in a forum on the network at 5 p.m. that day.

Anderson provided the questions asked in the survey up to and including the favorability and support questions. They did not show any apparent effort to “push” voters into Jindal’s camp.

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