Trump, who handed the reins of much of his campaign this week to strategist Paul Manafort in an effort to shore up his operation before the nomination slips away, was swept out of delegate slots up for grabs at Colorado’s state convention. Adding to his woes, he picked up just one delegate of six on the ballot in South Carolina. The most painful result, though, may have been Trump’s failure to capture two of three slots in his strongest South Carolina congressional district.

In fact, Trump lost five of the six delegate seats on the ballot in South Carolina’s 3rd and 7th congressional districts. Ted Cruz nabbed a delegate in the 7th district, while another, Alan Clemmons, remained uncommitted despite Trump’s dominant finish there in the state’s Feb. 20 primary. (The Manhattan billionaire won 43 percent of the district’s vote, to Cruz’s 20 percent and Kasich’s 6 percent.) Cruz also won two of three delegates in the 3rd district, while a third — Susan Aiken, a supporter of Marco Rubio — will go to the convention as an uncommitted delegate…

Trump’s thinly staffed operations, even in the states he carried easily in February and March primaries, have left little organization behind to support delegate candidates. In addition to the congressional-district routs in South Carolina and Colorado, he’s been dealt setbacks in Indiana, North Dakota, Tennessee, Louisiana, South Dakota, and Georgia. Massachusetts is also shaping up as a delegate battleground, despite Trump’s dominance of the popular vote there.