With their angry left-wing base whipped into a frenzy of opposition on virtually every imaginable front, some Senate Democrats are promising to wage a filibuster against President Trump's yet-unnamed Supreme Court nominee. The president will unveil his selection tomorrow evening, yet Democrats are preemptively vowing to obstruct anyone he chooses -- retaliation, they say, for Republicans' refusal to consider the nomination of Merrick Garland under the Biden Rule. Battle lines, drawn: Senate Democrats are going to try to bring down President Donald Trump's Supreme Court pick no matter who the president chooses to the fill the current vacancy. With Trump prepared...