President Donald Trump just can’t help himself sometimes — not even when it comes to Russia, the country that has dogged his entire presidency.Amid an impeachment scandal related to his dealings with Ukraine — which the Kremlin invaded in 2014 — Trump dropped a quip Thursday about Russian President Vladimir Putin’s homeland.He joked in front of television cameras and reporters about building a “Russian Room” in the White House just hours after Speaker Nancy Pelosi told reporters when it comes to Trump “all roads lead to Putin.”[White House says it’s ready for impeachment votes and trial]During a lunch in the Cabinet Room with all permanent representatives to the U.N. Security Council, Zhang Jun, China’s ambassador to the United Nations, thanked Trump for a White House tour. He said he was impressed by the executive mansion’s holiday decorations, including in the “China Room.”Think fancy plates and bowls.The Russian representative, flashing his nation’s sometimes-wry sense of humor, spoke a few minutes later as Trump went around the long rectangular table and allowed each of his guests to speak. He expressed joking disappointment in not having noticed a “Russian Room.”[Pelosi: ‘Don’t mess with me’]“We saw the China room, but we didn’t see the Russian Room,” Vasily Nebenzya told Trump. “Perhaps it’s the one that’s still top secret.”In a comment likely to be quoted by Democrats as the impeachment proceedings move to articles and a likely House floor vote, Trump quipped, “We’ll take care of that.”