Why Haley's nod is a big deal for Trump

Nikki Haley's decision to back former President Trump is a big development in the 2024 race that is likely to help unify Republicans further behind a candidate who has somewhat divided them.  

While Trump steamrolled though the primaries, a substantial protest vote in contest after contest has emerged for Haley — a concern for the ex-president's camp, though he brushed it off. 

Haley's decision could limit that protest. At a minimum, it means the woman making headlines for...