President Trump has a message for Republicans who didn't endorse him during his bid for the White House: "I never forget."

The president was appearing alongside Michigan Gov. Rick Snyder, a Republican, on Wednesday to tout plans to bolster manufacturing in the state and review Obama-era fuel-standard regulations opposed by automakers.

"Come on governor, even though you didn’t endorse me,” Trump quipped. Secretary of Transportation Elaine Chao, who was also in attendance, laughed and remarked that "he's not forgotten."

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"I never forget," Trump replied.

Snyder did not endorse any GOP candidate during the party's 2016 primaries and never threw his support behind Trump after he won the Republican nomination.

“I mean, he’s made that comment about quite a few people,” The Detroit News quoted Snyder as saying after the exchange. “So I view as something that, again, let’s move forward, let’s build bridges and let’s make a stronger economy in our country.”

Trump has bashed those who have failed to endorse him before. For example, he railed against Sen. Ted Cruz Rafael (Ted) Edward CruzLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list 'Parks and Rec' cast members hosting special reunion to raise money for Wisconsin Democrats MORE (R-Texas) in July after the onetime GOP presidential candidate failed to endorse him at the Republican National Convention, urging Republicans to instead vote their consciences.