This article at 538.com summarizes recent national presidential polls that include Gary Johnson.
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A group has been formed to study whether Colorado should switch from presidential caucuses to primaries. It includes some state legislators, and has reached out to the Libertarian and Green Parties. See this story.
On May 23, SurveyUSA released a new poll for the California U.S. Senate race. Only five of the 34 candidates were listed: Kamala Harris 31%, Loretta Sanchez 22%, Duf Sundheim 9%, Tom Del Beccaro 9%, Ron Unz 7%, other or undecided 22%.
These results, very similar to poll results in April, suggest that the November 8 ballot will list only two Democrats, with no write-in space. This article in the Washington Times suggests that such an outcome will be bad for both the Republican Party and the Democratic Party. Especially significant are the quotes from Dan Schnur, a well-known Californian who has been active at high levels in state government. He has previously been a supporter of the top-two system, but now seems not to be.
On May 21-22, the Missouri Republican Party held its state convention. The body endorsed the idea that the Republican Party should seek a closed primary for itself. See this story.
On May 23, filing for the Washington state August 2016 primary closed. Here is a list of candidates. Thanks to Kelly Haughton for the link.