JACKSON, Mich. — After a brief speech at the opening of a campaign office here, Tim Pawlenty was asked if he would return to Michigan “when you’re vice president.” “We’ll know soon enough,” Pawlenty, dressed in shirt sleeves, told the crowd with a chuckle. The former Minnesota governor is believed to be on Mitt Romney’s short list of running mates and there is speculation that the choice could be made any day. Hank Choate, the chair of the Jackson County Republicans, asked the former Minnesota governor what his schedule is like Friday, asking a question many of the reporters in...