Sen. John McCain, R-Ariz., said Tuesday that Michael Flynn’s resignation as national security adviser highlights “dysfunction” in President Trump’s White House and raises fresh questions about the commander in chief’s relations with Russia. McCain, the chairman of the Senate Armed Services Committee, praised Flynn’s “invaluable contributions in the fight against terrorism” in a written statement released hours after the retired Army lieutenant general resigned. “At the same time, General Flynn’s resignation is a troubling indication of the dysfunction of the current national security apparatus,” the Arizona Republican said. “General Flynn’s resignation also raises further questions about the Trump administration’s intentions...