where Trump campaign officials met with Russian operatives prior to the 2016 election...notably, campaign manager, Paul Manafort, handing internal polling data to a Russian, Konstantin Kilimnik...and Don Jr. meeting in Trump Tower with a Russian attorney, Natalia Veselnitskaya, for the purpose of getting dirt on Hillary Clinton.
Trump sought, and received, assistance in winning the 2016 election from our worst enemy...the country all of our military trains against...that's what you call "Treason".