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WASHINGTON -- U.S. Rep. Kevin Cramer is calling on Donald Trump's Republican rivals to drop out of the race for president.

Cramer, a North Dakota Republican who endorsed Trump earlier this month, explained the only path to the nomination for both Ohio Gov. John Kasich and Texas Sen. Ted Cruz is a contested GOP convention, adding it's time for them to concede the nomination.

"They should start referring to Donald Trump as the likely nominee," Cramer told the Herald Thursday. "The sooner we get to rallying around the presumptive nominee, the sooner we can get to running against Hillary Clinton instead of running against each other."

Cramer's remarks come just days after the New York primary, where Trump won 89 delegates with more than 60 percent of the vote. Kasich won just more than 25 percent of the vote and netted four delegates, while Cruz won 14.5 percent of the vote and no delegates.

A Republican candidate needs 1,237 to clinch the nomination and avoid a contested convention this June in Cleveland.

Though he has been mathematically eliminated from clinching the nomination outside of a contested convention, Cruz, with 559 delegates, still is dominating Kasich, who has 148 delegates. Trump has 845.