Portman on being Trump's VP: 'No, I'm fine'
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Asked if he sees himself in the No. 2 spot, Portman told reporters, "No, I'm fine."
"I'm running for the Senate in Ohio," he added.
Portman's remarks came after he met with Trump on Thursday as part of a group of 10 GOP senators.
The Ohio Republican, who faces a tough reelection bid, said the sit-down "was a good listening session ... on both sides."
Portman formally endorsed Ohio Gov. John Kasich but has said he will support Trump if he's the nominee. 
The poll also showed Portman 1 percentage point behind his Democratic opponent, former Gov. Ted Strickland. Despite tight polls, Portman has a significant cash advantage.