The Trump campaign's top lawyers -- Rudy Giuliani, Sidney Powell, Jenna Ellis -- went into the weekend on the offense. On Thursday they held a news conference vowing to prove the existence of a far-ranging conspiracy to defeat the president. They were pressing a case alleging unfair voting practices in Pennsylvania. They were predicting victory. By Sunday night, everything had changed. A judge threw out the Pennsylvania case. Then, amid widespread skepticism, Powell, the author of a theory that voting machines had changed millions of Trump votes into Biden votes, was booted from the team, leaving an uncertain future.