WASHINGTON (AP) — Hockey star Matthew Tkachuk was ready to see some carnage at the White House . “It’s going to be the under in every single fight,” he told the crowd on the Ellipse on Sunday night. “I think it’s not going to last like halfway through. They’re all going to be knockouts or finishes early.” Tkachuk and his brother Brady — no strangers to occasional pugilism on the ice — were part of pre-fight festivities for UFC Freedom 250 , the mixed martial arts event on the South Lawn of the