WARRENSBURG, Mo. -- Sen. Jim Talent is not responsible for $3-a-gallon gas or the Iraq war, but many voters here are linking him to an unpopular commander in chief and say they will punish him at the polls because he is a Republican. Mr. Talent faces a significant re-election challenge in November, with Democratic state Auditor Claire McCaskill essentially running even with him in the polls. Voters in the increasingly frustrated electorate here, especially in economically challenged rural Missouri, say they likely will seek a change, even though they may disagree with the Democrats. Most voters interviewed said life "could...