Colorado Republicans cancel presidential vote at 2016 caucus
Move makes Colorado only state to date to opt out of early nomination process
By John Frank
The Denver Post
Colorado will not vote for a Republican candidate for president at its 2016 caucus after party leaders approved a little-noticed shift that may diminish the state’s clout in the most open nomination contest in the modern era.
http://www.denverpost.com/news/ci_28700919/colorado-republicans-cancel-2016-presidential-caucus-vote
Ted Cruz wins Wyoming Republican presidential ... - Yahoo
https://www.yahoo.com/.../ted-cruz-poised-win-wyoming-republi...
3 days ago - Wyoming does not hold a primary vote. Instead, 475 party activists convened in Casper on Saturday to hold a state convention and award 14 .
The GOP executive committee has voted to cancel the traditional presidential preference poll after the national party changed its rules to require a state’s delegates to support the candidate who wins the caucus vote.
Your above citation is misleading. All Wyoming registered Republicans were eligible to participate in the precinct caucuses, to choose their precinct delegates, and many thousands of Wyoming registered republicans did exactly that.