In a Halloween-themed tweet, Rep. Charles Rangel (D-N.Y.) highlighted the United States' "scary" wage gap as he stressed his unwavering support of fair pay, a trending topic among other Democratic congressmen.

On the other side of the aisle, Sen. John McCainJohn McCainSenate votes to elevate Cyber Command in military Senate sends annual defense bill to Obama's desk Trump really can't do much to reduce tensions with Putin's Russia MORE (R-Ariz.) gave a grown-up twist to the discussion of Halloween candy by arguing that recent agricultural legislation is to blame for this year’s spike in candy prices.

Some lawmakers approached All Hallows' Eve as an opportunity to campaign. The Democratic Party urged the public to take the Halloween spirit into the poling booths, appropriating President Obama's frequent campaign-trail phrase "Don't boo, vote!" And possible first lady Ann Romney and Rep. Cory GardnerCory GardnerGOP senator: Congress will ‘undo the damage’ from Obama Senate GOP to Obama: Stop issuing new rules Gardner's chief of staff tapped for Senate GOP campaign director MORE (R-Colo.) boasted jack-o'-lanterns with campaign messages: Romney on her Pinterest page and Gardner as his Twitter avatar.

The president often tells crowds on the campaign trail to get out and vote instead of booing his opponent, Mitt Romney.

In other Halloween news, New Jersey Gov. Chris Christie (R) postponed Halloween in the Garden State until Nov. 5 to give the state time to respond to Hurricane Sandy. He and several other members of Congress, including Reps. Gary Peters (D-Mich.), Lynn Jenkins (R-Kan.) and Darrell Issa (R-Calif.)  had safety on their minds in tweets urging a safe holiday.