Al Behrman/AP Images

It was just last week Senator Rob Portman, R-Ohio, received the endorsement of House Speaker John Boehner, who said he was "partial" to Portman when asked who his pick would be Mitt Romney's running mate.

This week, Portman punted when asked if he would be ready if the call came asking him to join the ticket.

"I'll let the Romney folks talk about readiness," Portman told ABC News Monday. "Governor Romney has a lot of great choices. There are a lot of people out there who can do the job and ultimately I think people vote for the president, not the vice president."

Portman has long been rumored to be on Romney's short list of running mates and has appeared often on his behalf in states such as North Carolina, South Carolina, Massachusetts, New Hampshire, and his home state of Ohio.

Get more pure politics at ABC News.com/Politics and a lighter take on the news at OTUSNews.com

Today Portman rallied a group of 200 plus Republicans for Romney in Lancaster County, Pa., telling the crowd he "had a good feeling" the crucial swing state would land in the red column this election cycle.

Portman spent the majority of the speech ticking off what he called President Obama's "fumbles" since taking office. Pointing to health care, the poverty rate, the debt, and deficit, Portman infused his standard stump speech with a bit more fire, charm, and humor. The Ohio senator had the crowd laughing and cheering throughout much of his speech and received a standing ovation as he left the stage.

Asked after his speech about Romney's apparent fumbles over the past week during his overseas trip to England, Israel, and Poland, Portman called his time abroad, "strong."

"I think it's great that he's over there touring not just three important countries, but three of our most important allies in the world," Portman said. "I think that shows people he does have a lot of foreign policy interest and background and so he is going to stand with our allies."