A large plume of black smoke was seen billowing from the burning building, which appeared engulfed in flames, according to video footage from the scene.
Financial woes have become a major vulnerability for the presumptive Republican nominee as he enters what is expected to be the most expensive presidential election in history.
Police said eight masked suspects entered the store and used hammers to smash the glass displays, stealing approximately $150,000 in assorted jewelry before fleeing the area.
The House already has three vacancies – left by two Republicans and one Democrat – and Republican Rep. Ken Buck of Colorado has said he will leave Congress after this week.