Vice President Kamala Harris defended two Tennessee Democratic legislators who were expelled — and quickly reinstated — after leading a rowdy pro-gun control protest with bullhorns on the floor of the state House of Representatives last month. Harris told the National Action Network’s annual convention in Harlem Friday that a “bullhorn becomes necessary” when “extremists” won’t listen. Tennessee House Speaker Cameron Sexton, a Republican, accused the Democrats of “doing an insurrection in the Capitol” and led his caucus in expelling them for the disruption, invoking terminology used by critics of former President Donald Trump to describe the violent riot by...