A political operative and two companies that facilitated a fake robocall using AI to impersonate Joe Biden should be required to pay millions of dollars in damages and should be barred from taking similar future actions, a group of New Hampshire voters and a civic action group said in a federal lawsuit filed on Thursday.The suit comes weeks after Steve Kramer, a political operative, admitted that he was behind the robocall that spoofed Biden’s voice on the eve of the New Hampshire primary and urged Democrats in the state not to vote. Kramer was working for Biden’s challenger Dean…