Sen. Ted Cruz is making the case that GOP presidential rival John Kasich and his pesky campaign cannot win the party nomination unless he has top showings in eight states -- an argument that could help Cruz in the upcoming Wisconsin primary and the GOP White House race. Cruz in recent interviews has repeatedly cited a Republican National Committee rule that states candidates can be nominated only if they've won the total delegate majority in eight or more states, as reported first by The Washington Post. Trump has 736 pledged delegates, followed by Cruz with 463, then Kasich with 143...