Bill Moyers (the journalist/producer who did a great documentary on the medias' role in the lead-up to the Iraq war) created a helpful timeline regarding what people on Twitter call #TrumpRussia .
MSNBC's Rachel Maddow has done many shows focusing on Trump-Russia connections (see some videos here dating from Feb. 27 - Apr. 5).
Maddow is not alone: bits of information just keep coming out. For example, the world recently learned that British Intel passed info to the U.S. Government about Trump campaigners' communications with Russians in 2015-2016. The governments of Estonia, Germany, Australia, and Poland also passed related information to the U.S. government.
The various information streams have caused names like Carter Page, Roger Stone, Paul Manafort, and Mike Flynn to grace more and more headlines since Pres. Trump took office.
And Bill Moyers' timeline can help you make some sense of it--although, at this point, there is no publicly available proof of direct involvement by Trump or of crimes committed by various campaign staffers.