Why are 1 in 5 GOP voters still voting for Nikki Haley over Donald Trump?

Sixty-nine days after she suspended her presidential campaign, former UN Ambassador Nikki Haley is still drawing a consistent one in five Republican primary voters away from the indicted ex-president Donald Trump.

Tuesday's primaries in Maryland, Nebraska, and West Virginia continued that trend, even though she has been nearly totally silent and even though Trump has already gained enough delegates to be the presumptive Republican nominee.

In Maryland Tuesday night, 47,597 GOP voters chose Haley over Trump...