One of America’s top sheriffs and supporter of President Trump is warning that if the administration doesn’t curb the explosion of illegal immigration across the southern border, the president will lose reelection in 2020.

“This last election was a mandate,” said Frederick County, Md., Sheriff Chuck Jenkins. “If he doesn’t accomplish something, he’s done. His whole campaign was 75% was based on that,” he told Secrets at an immigration roundtable in neighboring Virginia Wednesday night.