Graham Platner, a Senate candidate in Maine's Democratic primary, told NBC News he wants to investigate the Trump administration, impeach Supreme Court justices Thomas and Alito, and replace Senate Democratic leadership if elected. Platner alleged Trump has committed impeachable offenses including corruption and insider trading, and said Thomas's relationship with billionaire Harlan Crow constitutes corruption because Thomas doesn't recuse himself from cases affecting Crow's businesses. Multiple recent polls show Platner leading both his Democratic rival Gov. Janet Mills and Republican Sen. Susan Collins in what's become a closely watched race, and he has endorsements from Sens. Bernie Sanders and Elizabeth Warren.