Democratic Sen. Cory Booker of New Jersey is dropping out of the 2020 presidential race.

Booker had struggled to make a dent in the polls and did not qualify for Tuesday's Democratic presidential debate ahead of the Iowa caucuses.

"It's with a full heart that I share this news — I've made the hard decision to suspend my campaign for president," Booker said.

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Sen. Cory Booker of New Jersey on Monday announced he's dropping out of the race for the 2020 Democratic presidential nomination.

"It's with a full heart that I share this news — I've made the hard decision to suspend my campaign for president," Booker said in a statement alongside a video that announced the end of his campaign.

"To my team, supporters, and everyone who gave me a shot — thank you," Booker added. "I am so proud of what we built, and I feel nothing but faith in what we can accomplish together."

In the video, Booker signaled that he planned to continue campaigning in support of the eventual Democratic nominee as well as for down-ballot candidates.

"And so now I recommit myself to the work," Booker said. "I can't wait to get back on the campaign trail and campaign as hard as I can for whoever is the eventual nominee and for candidates up and down the ballot."

Booker also thanked his supporters.

"Campaigning over this last year has been one of the most meaningful experiences of my life," he said. "Meeting you, meeting people across this country who believe — who know — that we have challenges right now in our nation, but together we will rise."

The New Jersey senator, who previously served as mayor of Newark, ran on a message of optimism and unity amid a divisive era in US politics — including among the Democratic contenders on issues like healthcare.

"Together, we will channel our common pain back into our common purposes," Booker said in a video announcing the launch of his campaign last year. "Together, America, we will rise."

Despite entering the race as a better-known politician than many of the other candidates, Booker had struggled to make a dent in the polls and did not qualify for the December Democratic presidential debate or Tuesday's debate ahead of the Iowa caucuses.

Booker had garnered a reputation as a fierce advocate for criminal justice reform, and continued to speak passionately on the issue along the campaign trial. In Booker's first radio interview after kicking off his 2020 campaign back in February, he reiterated his calls for marijuana to be legalized at the federal level.

"We do not have equal justice under the law," he said at the time. "I believe in redemption."

During a debate in November, Booker quipped that he thought former Vice President Joe Bidenmight have been "high" when he'd voiced opposition to legalizing marijuana.

Though he's no longer running for president, Booker will continue to be active in US politics as a senator, including in President Donald Trump's impending impeachment trial.

Trump chimed in on Booker ending his campaign via a tweet on Monday.

"Really Big Breaking News (Kidding): Booker, who was in zero polling territory, just dropped out of the Democrat Presidential Primary Race," the president said. "Now I can rest easy tonight. I was sooo concerned that I would someday have to go head to head with him!"