GOP senator: I’ll vote for Trump, but I won’t endorse him

New Hampshire Sen. Kelly AyotteKelly Ann AyotteFive possible successors to Mattis Mattis resigns, says views aren't in line with Trump's Election Countdown: O'Rourke brings in massive M haul | Deal on judges lets senators return to the trail | Hurricane puts Florida candidates in the spotlight | Adelson spending big to save GOP in midterms MORE (R) says that while she can "work with anyone," she will vote for Republican nominee Donald TrumpDonald John TrumpTrump's approval holding steady in poll, despite shutdown drama Trump huddles with Pence, Mulvaney, Kushner as shutdown hits one week Trump jokingly congratulated acting EPA chief on not acting like Pruitt: report MORE for president.

“While he has my vote, he doesn’t have my endorsement,” Ayotte told CNN’s Manu Raju Monday. "There’s actually a big distinction. An endorsement is one where I’m out campaigning with someone. I’m going to continue to focus, really, on my race.”

Ayotte said her first priority remains New Hampshire voters, even if it brings her into conflict with Trump or other lawmakers.

“Whether I have his endorsement or not, it’s going to be about calling it like I see it for the people of New Hampshire,” she said of Trump.

Trump had previously demurred on endorsing the reelection bids of Ayotte and Sen. John McCainJohn Sidney McCainDeparture of 'Trump’s generals' galvanizes Trump resistance Trump's military moves accelerate GOP search for next McCain 7 heartwarming moments in 2018 politics MORE (R-Ariz.) before deciding to back their campaigns.

Ayotte added she would cooperate with Democratic nominee Hillary ClintonHillary Diane Rodham ClintonTrump's approval holding steady in poll, despite shutdown drama House GOP probe into FBI, DOJ comes to an end Dershowitz: 'It's been harder for me to get on anti-Trump networks' like CNN MORE should she win the presidency instead of Trump.

“Absolutely, but I’ll work with anyone,” Ayotte said.

Ayotte is widely considered one of the most vulnerable Republicans in the race to preserve the GOP’s Senate majority.

Democratic challenger Gov. Maggie Hassan said on Monday that Ayotte is trying to please every side when discussing Trump.

“She is trying to have it both ways,” said Hassan. "I don’t think any elected leader who is supporting Donald Trump for the presidency should hold office."