Ohio Gov. John Kasich isn't ruling out voting for Republican presidential nominee Donald TrumpDonald Trump Pence said he's 'proud' Congress certified Biden's win on Jan. 6 Americans put the most trust in their doctor for COVID-19 information: poll OVERNIGHT DEFENSE: Biden administration to evacuate Afghans who helped US l Serious differences remain between US and Iran on nuclear talks l US, Turkish officials meet to discuss security plans for Afghan airport MORE, though he says it's "highly unlikely" he'll support his former rival.

"I'll let everybody know when, but I think my actions have spoken very loudly, louder than even my words," Kasich told CNN's Dana Bash in an interview broadcast Friday on "New Day."

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"So is it still possible that you could vote for Donald Trump?" Bash pressed.

"Very unlikely," Kasich responded, adding, "Too much water under the bridge."

And if Trump wins?

"Well, we'll see what happens if that happens," Kasich said. "Whoever is the president, if I can do something to help them in a constructive way, and something I agree on, absolutely."

Kasich has been one of a few former Trump rivals to withhold their endorsement, despite an earlier pledge to back the eventual nominee. Sen. Ted CruzRafael (Ted) Edward CruzBritney Spears case casts harsh light on conservatorships New Jersey governor tweaks Cruz on Cancun over moving truck quip Hirono tells Ted Cruz to stop 'mansplaining' MORE (R-Texas) and former Florida Gov. Jeb Bush have both also refused to get behind New York real estate mogul.

On Thursday, news emerged that President Obama hadĀ enlistedĀ the Ohio governor to make a final push for his stalled Trans-Pacific Partnership trade deal.

Kasich will attend a bipartisan meeting Friday at the White House aimed at touting the benefits of the Pacific Rim trade agreement before later appearing at the White House daily briefing.

"Frankly, I welcome it," Kasich said of backlash to his decision to join the effort, speaking of putting the country over the party.

And while he's not pushing Trump in Ohio, a swing state where polling this week has indicated a tight race, Kasich said he would try to get Republicans to the polls in general.

"We're going to go help people get the vote out, obviously," Kasich said. "Get Republicans out to vote, period."

"We want to reelect Sen. [Rob] Portman, and we want to reelect people down-ticket," he said.