I'm pretty sure that Trump and Republican party politicians' collusion with Russia to influence the 2016 elections need not rise to the level of treason for criminal charges to be levied. What I think is great is that legal charges of treason need not be involved for Trump and the Republicans who are involved in or who attempt to cover up evidence because it's politically damaging to be viewed as un-American or "traitors" to American democracy in the minds of citizens. What's really great about the disgusting mess Republicans are making of the nation is that Republicans are on the wrong side of history, the wrong side of the rule of law. This is the party that brought us Pro-life terrorism, stole healthcare from Americans and who put a filthy, genital grabbing tv celebrity in the White House who is now using the office to enrich his already disgustingly-rich family at the expense of all Americans. 
http://www.cnn.com/2017/04/21/politics/russian-bombers-tensions-trump/