Progressive Democrat Graham Platner won the party’s US Senate primary in Maine after a bruising campaign which became as much about his past and accusations of misbehaviour as about the policies voters cared about.With more than 30 per cent of votes counted, Platner (41), a oyster farmer and military veteran, had about 74 per cent support. Maine governor Janet Mills, who suspended her campaign in April amid lacklustre polling and fundraising but remained on the ballot, had 20 per cent.Platner accepted the nomination in Blue Hill on Tuesday evening, promising to “be a senator for the people who cannot afford...