[G8 Diplomat]

I can’t find any evidence that Thompson himself said that

It's in the article:

The Tennessean described him as “a pro-choice defender in a party with an anti-abortion tilt,”

[G8 Diplomat]

And this:

“I’m not willing to support laws that prohibit early term abortions,” he told the Conservative Spectator, a Tennessee newspaper, in 1994. “It comes down to whether life begins at conception. I don’t know in my own mind if that is the case so I don’t feel the law ought to impose that standard on other people.” “The ultimate decision on abortion should be left with the woman and not the government,” he told another newspaper.