"We're sending our guys — they're doing door to door, they're doing phone banks," he said. "We know how important it is to keep a balance on the Senate."
Labor unions less enthusiastic about Democrats ahead of midterm elections →
And Arkansas Sen. Mark L. Pryor, who is only pulling 42.5 percent of the vote, according to realclearpolitics.com, said, "My concern would be that the people we arm today may be our enemies tomorrow."
CURL: 'I'm not Barack Obama' is Democrats' election mantra →