Maine voters head to polls on Tuesday for closely watched primary election (opens in new tab)

All eyes on US Senate race as Graham Platner, embroiled in controversy, is set to advance as Democratic nomineeVoters in race has become a national fixation as Democrats try to unseat a longtime Republican with a political newcomer who has .Graham Platner, 41, is set to advance as the Democratic nominee for the Senate, after his primary rival – the state’s two-term governor, Janet Mills –