Ohio senator Rob Portman pulls support for Trump

Ohio Sen. Rob Portman is revoking his support for Donald Trump and says he will instead back Trump's running mate Mike Pence for president.

Portman says he had hoped to support his party's nominee because he felt it was "appropriate to respect the millions of voters" who backed Trump during the GOP primary. He says that while he continues to "respect" those who back Trump, "I can no longer support him."

Portman is running for re-election in what was supposed to be one of the most competitive Senate races in the country. However, he's maintained a steady lead over Democrat Ted Strickland for months.