Trump and Russia: What is the Manafort connection?

Donald Trump's former campaign manager has been charged with conspiring to defraud the United States. A total of 12 charges have been filed against Paul Manafort, who resigned as Trump's campaign manager in August 2016 amid claims he was lobbying for pro-Russian forces in Ukraine. The allegations against Manafort include conspiracy to launder money and violating federal lobbying and banking laws. So what does all this mean for Trump?