AP

John and Cindy McCain at a campaign stop in New Hampshire.

WASHINGTON -- Republican John McCain's wife was treated Wednesday for a "minor sprain" after someone at a campaign event in Michigan shook her hand firmly.

Campaign spokeswoman Jill Hazelbaker said Cindy McCain left the West Bloomfield, Mich., campaign event Wednesday for X-rays at a local hospital after an enthusiastic supporter squeezed too much. McCain's wife had surgery for a wrist injury several years ago, and the handshake exacerbated it.

Later Wednesday, Cindy McCain returned to the campaign trail and stood, with her arm in a sling, next to her husband as he spoke to reporters.

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