Trump, Cruz in two-way Republican race

Donald Trump kept a firm grip on his lead in the Republican race for the White House on Sunday but Senator Ted Cruz emerged as his strongest challenger in weekend primaries with mixed outcomes. Hillary Clinton meanwhile extended her frontrunner status in the Democratic contests but Senator Bernie Sanders showed he is still in the race with a pair of victories. Clinton and Sanders compete Sunday in Maine's nominating contest and face off in a televised debate in Flint, Michigan just two days befo