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 Sidney McCainThe Hill's Morning Report: Inside the Comey memos Democrats mull audacious play to block Pompeo Overnight Defense: Trump steps up fight with California over guard deployment | Heitkamp is first Dem to back Pompeo for State | Dems question legality of Syria strikes 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 Scott GardnerPoll: Almost two-thirds of Texas voters support legal recreational marijuana House, Senate GOP compete for cash Overnight Cybersecurity: Senators want info on 'stingray' surveillance in DC | Bills to secure energy infrastructure advance | GOP lawmaker offers cyber deterrence bill 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.