Former Pennsylvania senator Rick Santorum won Colorado’s Republican presidential caucuses Tuesday night, the state GOP chairman announced in an interview on CNN.

Santorum led the race by 3 percent with more than three-fourths of the vote reported by AP, but state GOP Chairman Ryan Call said Santorum was the winner based on 98 percent of precincts having reported their results to the state party.

The late-night win capped off a hat trick for Santorum, who won the Missouri primary and the Minnesota caucuses earlier in the night.

While his margin of victory was big on those two states, his win in Colorado was easily the most surprising.

Mitt Romney took the state with 60 percent of the vote in 2008 — two days before ending his presidential bid. He chose to hold his results-watching rally in Denver, a sign of confidence, but he wound up delivering his remarks to the crowd long before most of the results rolled in.

While none of the state’s 36 delegates are actually assigned as a result of tonight’s caucuses, some level of voter preference generally carries over to the district and state conventions, where delegates are selected.