Gallup has new poll numbers out on some major contested Senate races:

Montana is very, very close. The new poll shows Democrat Jon Tester leading Sen. Conrad Burns 48-45 among likely voters but trailing Burns 42-44 among registered voters.

In Ohio, the poll shows Democrat Sherrod Brown leading Sen. Mike DeWine 46-40 among likely voters but ahead by a much smaller margin, 39-37, among registered voters.

In Missouri, Republican Sen. Jim Talent leads Democrat Claire McCaskill 50-44 among likely voters, but the race is tied, 41-41, among registered voters.

In Pennsylvania, the poll (taken before the debate on “Meet the Press”) shows Democrat Bob Casey, Jr. leading Sen. Rick Santorum 56-38 among likely voters and 49-35 among registered voters.