Inside the haunted secrets of the U.S. Capitol

It's Halloween Eve, and one of the spookiest places in the country is the U.S. Capitol ahead of Tuesday's midterms. Tonight, Fox News Chief Congressional Correspondent Chad Pergram takes a break from chasing down lawmakers to chasing ghosts. In Ohio and Michigan, this is the most expensive midterm in history, and come Wednesday, we'll know which side controls Congress. On Capitol Hill, Chad Pergram, Fox News. Clear? Clear. You thought we show you everything that happens here at the Capitol, but when the lights dim, the shadows stretch, and the Capitol falls deathly silent, congressional phantasms sometimes appear. Join me on this journey if you want. You dare. Ha, ha, ha, ha, ha. President and former Congressman John Quincy Adams died near the Old House Chamber after yelling no, opposing a bill honoring military officers. Visitors claim that Adams' emphatic no still echoes through the Capitol. There is also the legend of the demon cat. Mysterious overgrown feline known to prowl the Capitol just before national emergencies. Its paw prints are visible near the old Supreme Court chamber. And then there is the ghost of Kentucky Congressman William Talby. Journalist Charles Kincaid gunned down Talby on a Capitol stairwell after a dispute. Splotches of Talby's blood are still visible on the marble. Next, we trace the fall. It's coming from inside the House of Representatives. Talby's ghost supposedly trips reporters, including yours truly, when I tried to get a comment from then-Canadian Prime Minister Justin Trudeau. They're here, you might say, when the next class of lawmakers comes to the Capitol after the election. Members tapping at the House chamber door. And those who lost return never more. But some spirits never leave the Capitol. Don't listen for yea or nay. Perhaps for boo. On Capitol Hill, Chad Pergram, Fox News.