Jeb Bush Jr. visited New York University on Thursday to rally young voters to support his father's presidential campaign, saying Barack Obama won past elections in part because the Democrat "kicked conservatives' butts" when it came to getting out the vote on college campuses.

Republicans must have "the humility to see what we did wrong in the last cycle," said Bush, 31, the youngest of former Florida Gov. Jeb Bush's three children.

He said at the meeting of the NYU College Republicans that the country knows little about this father.

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"The purpose of the campaign is to share who Dad is," the brisk-speaking younger Bush said. "A lot of people know him as George's brother or George's son or even Barbara's son, but people gotta know him as Jeb."

The question-and-answer session with about 100 students at the Greenwich Village campus was part of the campaign's "Mission: Next" initiative to reach voters under 40 by visiting 450 colleges.

Jeb Bush Jr. portrayed his father as hardworking, experienced and ready to lead.

"In political dog years, he's like 400 years old," he said.

"Seven years is a long time to be outside the White House gates," he added, referring to the end of his uncle George W. Bush's presidency. "Republicans want to win."

Bush fielded questions about college debt, the federal tax, health care costs ("let the states be the incubators"), climate change ("innovate, not regulate") and other topics.

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He dismissed but then acknowledged his father's low poll numbers, saying, "Polls are frustrating at times. You've got to keep your head down and grind out."

A Fox News poll released Tuesday showed Jeb Bush trailing Donald Trump, Ben Carson, Marco Rubio and Ted Cruz for the Republican nomination with support from 8 percent of GOP voters.

Jeb Bush Jr. took digs at his father's competitors, calling Trump "the guy with the crazy hair" taking the "sunlight" out of the 2016 race, slamming Tuesday's Democratic debate as "like a pillow fight" and criticizing the Democratic front-runner, former Secretary of State Hillary Rodham Clinton.

"A Bush is better than a Clinton," he said to applause from the roomful of young Republicans.