Democratic Sen. Claire McCaskill’s reelection race against Republican Josh Hawley remains tight as a wire, while Sen. Bill Nelson (D-Fla.) has drawn a tough challenger in Gov. Rick Scott (R).

In New Jersey, Sen. Bob Menendez (D) is ahead in polls but Republicans still think they have a chance of pulling off an upset.

Democrats argue that they have an advantage on healthcare, the number one issue for voters.

They are trying to capitalize on recent comments by Senate Majority Leader Mitch McConnell (R-Ky.), who blamed Social Security and Medicare for the nation’s deficit problems and said Republicans may take another shot at repealing ObamaCare next year.