McConnell, Grimes Face Off at Fancy Farm in Kentucky

This hamlet in western Kentucky played host Saturday to candidates in the nation's marquee Senate election fight, who framed the race as a choice between experience and change.

The Democrat, Kentucky Secretary of State Alison Lundergan Grimes, distilled the choice in stark terms, telling a sea of partisans from both parties: " Mitch McConnell doesn't care. I do."

Mr. McConnell, the Senate Republican leader, warned the attendees that casting a vote for Ms. Grimes in November would amount to a vote for President Barack Obama, who remains unpopular in this...