ST. LOUIS – Gripping a microphone outside the courthouse where the infamous Dred Scott case over slavery was argued in 1847, former Rep. Cori Bush portrayed her ouster from Congress as another historic setback set to be reversed. “We’re standing here saying, send back that descendant, send her back to the place that enslaved people built,” Bush said. “This is our moment.” The crowd chanted “send her back.”Recommended VideosA progressive firebrand who started her political career as a Black Lives Matter organizer in Ferguson, Bush served two terms before losing a primary challenge to Wesley Bell, a moderate local prosecutor.They're...