A watchdog group filed a Senate ethics complaint Monday against Sens. Kamala Harris and Elizabeth Warren for sending out fundraising emails asking for donations to support their votes against Justice Brett M. Kavanaugh — even before they cast their votes against him. While voting and then asking supporters to back that decision with cash is common, the watchdog group, the Foundation for Accountability and Civic Trust (FACT), says asking for money ahead of time crosses the line into vote-buying.