The Washington Post

"He said he loves his son and he doesn't care who his son marries -- as long as it's not a Democrat.

Many top GOP presidential contenders will either be up for reelection in 2016 or will be in the middle of their terms as governors, which are not ideal circumstances.

Portman's name surfaced last week as a potential challenger to Sen. Jerry Moran (R-Kan.), who has long expressed interest in the job.