Graham Platner is returning to Maine early from Washington after meeting with Senate Democrats on Tuesday due to a growing media presence at his family home and restaurant, a source familiar with the situation said. Platner, an oyster farmer and Marine veteran from Sullivan, is expected to win the Democratic nomination next week for the right to challenge five-term Republican Sen. Susan Collins in November, a race national Democrats have identified as critical to flipping the Senate. His return comes amid a swirl of controversy. Over the weekend, The Wall Street Journal and New York Times reported that Platner sent sexually...