The Russian goal with 2016 (Trump, Clinton, Stein, Facebook) and now (Facebook, Trump, Gabbard, Ukraine) is to weaken US standing/influence in the world, one way to do that is to sow internal discord.
They are succeeding, with Trump's help
"Partisan political division and the resulting incivility has reached a low in America, with 67% believing that the nation is nearing civil war, according to a new national survey.
“The majority of Americans believe that we are two-thirds of the way to being on the edge of civil war. That to me is a very pessimistic place,” said Mo Elleithee, the executive director of Georgetown University’s Institute of Politics and Public Service.
And worse, he said in announcing the results of the institute’s Battleground Poll, the political division is likely to make the upcoming 2020 presidential race the nastiest in modern history."
To the last part in bold:
1) Trump follows the Roy Cohn approach, which plays right into Russian hands
2) Trump just called Never Trump Republicans "scum"
3) even though there have always been GOP in the room (committees are both parties), Trump House supporters just "stormed" impeachment hearings (Roy Cohn-esque)
Never understood how so-called "red blooded American" ie nationalists) Trump supporters embrace this nonsense when clearly it hurts our democracy and aids the Russians