June 17, 2016 7:24 AM EDT

John Kasich and two other prominent Republicans said on the one-year anniversary of Donald Trump’s announcement speech that they won’t endorse him for president.

Kasich, who ran against Trump in the primary, was asked on MSNBC Thursday about the pledge he signed saying he would support the eventual nominee. “It’s painful,” the Ohio governor said, NPR reports. “Look I’m sorry that this has happened. We’ll see where it ends up. I’m not making any final decision yet, but at this point, I just can’t do it.’ ”

Maryland Gov. Larry Hogan told the Washington Post that not only would he not endorse Trump, he won’t vote for him, either. “I guess when I get behind the curtain I’ll have to figure it out,” he said of casting his ballot. “Maybe write someone in. I’m not sure.” Hogan had endorsed New Jersey Gov. Chris Christie in the primary, who later went on to back Trump.

Fred Upton, a fifteen-term Republican representative from Michigan, told the Detroit News that Trump’s candidacy had gone “off the track” and that he is going to “stay in [his] lane.” ”

“There’s a lot of things that folks are not happy about with either of these two candidates,” Upton said. “We’re running our own race, and don’t look for me to endorse anyone in this race probably the rest of the year.”

Write to Tessa Berenson at tessa.berenson@time.com.

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