Las Vegas (CNN) In a visit to boost one of the nation's most vulnerable Republican senators ahead of this fall's November election, President Donald Trump unveiled a new nickname for the Democrat running to unseat Sen. Dean Heller.

"Wacky Jacky," Trump said at the Nevada GOP convention, in reference to Rep. Jacky Rosen. "You don't want her as your senator."

Trump's short Saturday swing through Las Vegas was aimed largely at bolstering Heller, who is running for re-election in a state Hillary Clinton won in 2016. Just before his speech to the state GOP, he held a backstage fundraiser for Heller.

During the speech, Trump listed off several of his administration's accomplishments, notably the passage of tax cuts and repealing the individual mandate under Obamacare.

As controversy still rages over his administration's handling of immigrant families at the Southern border, Trump said he sees the issue as immigration as a winner for Republicans in the midterms.

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