WATCH: EX-GOP Senator Pat Toomey Explains Why He Won't Vote For Trump

During an interview on CNBC on Tuesday, Pat Toomey, the former Republican senator from Pennsylvania, said that he wouldn't be voting for Donald Trump this fall. 

Toomey, who served in the Senate from 2011 through 2023, was long considered to be one of the moderate Republicans in the body. But like many others in the GOP, he decided to support Donald Trump in 2016 and 2020. He will be making a change in 2024, though. 

The former lawmaker told CNBC's Joe Kernan, "First of all, I voted for Donald Trump twice, in 2016 and 2020. But when you lose an election and you try to overcome the results so that you can stay in power, you lose me. You lose me at that point."

When asked if he was supporting Harris, he said no, explaining, "I acknowledge that the outcome is a binary situation, but my choice is not. Okay? I have the choice, and you and I are just going to disagree on this."

Kernan countered, "What if it came down to one vote? And it was yours that put Kamala Harris in. Then it is yours."

Toomey stuck to his original argument, telling the host, "It is an acceptable position for me to say that neither of these candidates can be my choice."