A GOP-led Senate Intelligence Committee found that DJT's Campaign Manager handed internal polling

data to a Russian Operative prior to the 2016 election...that's what you call "Collusion"...but there's LOTS more evidence than that (see link)

Link: https://www.politico.com/magazine/story/2017/03/connections-trump-putin-russia-ties-chart-flynn-page-manafort-sessions-214868/