Though the poll has limitations, Johnson’s double-digit performance was reflected in other Mountain West states.

Johnson polled 25 percent in New Mexico, where he was governor; 23 percent in Utah; 19 percent in Idaho; 16 percent in Colorado and 14 percent in Montana.

Jim King, a professor at the University of Wyoming, said voters are looking for an alternative to Trump and Clinton.

“There’s enough dissatisfaction with the Republican and Democratic nominees that third-party candidates are becoming more attractive,” King said.

Keeping with trends seen in The Washington Post poll, the Libertarian Party has traditionally found stronger support in the Mountain West than in other regions, King said.

The Johnson campaign could not be reached for comment.

Sarwark, the national party chairman, said he thinks there’s a good chance Johnson can have high enough poll numbers to be able to participate in debates with Trump and Clinton.

Johnson needs to poll nationally at 15 percent before he can participate in the major debates.