Haley's 'zombie' White House bid is still haunting Trump

She abandoned her White House ambitions two months ago, yet Nikki Haley is still taking a significant chunk of votes in presidential primary contests -- underlining a persistent refusal among a sizable bloc of Republicans to get behind Donald Trump.

In his latest victory over Haley in Indiana on Tuesday, the polarizing tycoon romped home with 460,000 votes -- but he only notched 78 percent support, an underwhelming tally for a former president essentially seen as an incumbent.

In Marion County alone...