Republican presidential hopeful Donald Trump thinks his supporters are so loyal they would stick around even if he were to open fire on an innocent individual in the middle of New York City.

"I could stand in the middle of Fifth Avenue and shoot somebody and I wouldn't lose any voters, OK?" Trump told voters at his campaign rally Saturday in Sioux City, Iowa. The comment came as the billionaire was highlighting his poll numbers and the loyalty of his supporters.

"It's like incredible," he noted Saturday.

Trump, who's polling second in state-level surveys of Iowa Republicans, frequently claims his supporters are the "most intelligent" and loyal of any candidate's backers. Trump is currently second in the Washington Examiner's presidential power rankings.

According to an NBC News/Survey Monkey poll released in early January, 51 percent of voters who currently back the self-funded billionaire indicated they are "absolutely certain" they will vote for Trump.

In comparison, 36 percent of Texas Sen. Ted Cruz's supporters said they are "absolutely certain" they will continue to support his candidacy and 26 percent said the same of Florida Sen. Marco Rubio.