WASHINGTON (AP) — The breakdown of a plea deal with former Trump campaign chairman Paul Manafort and an explosive British news report about alleged contacts he may have had with WikiLeaks founder Julian Assange threw a new element of uncertainty into the Trump-Russia investigation on Tuesday.

A day after prosecutors accused Manafort of repeatedly lying to them, trashing his agreement to tell all in return for a lighter sentence, he adamantly denied a report in the Guardian that he had met secretly with Assange in March 2016. That's the same month he joined the Trump campaign and that Russian h...