The Federal Election Commission has revised its chart on primary dates (both presidential, and congressional primaries), and filing deadlines for candidates for primaries and the general election. See it here. Thanks to Thomas Jones for the link.
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On April 14, Louisiana Governor John Bel Edwards again moved the presidential primary. He had already moved it from April to June 20. The new proclamation moves it again, to July 11. Thanks to Ballotpedia for this news.
There is no primary for other office. Louisiana merely has a general election, on November 3, and a runoff if no one gets 50% in December.
The Maryland State Board of Elections meets April 22, and is expected to consider easing ballot access rules this year for new and minor party petitions, and independent candidate petitions.
Three members of the Libertarian Party were elected or re-elected to local Wisconsin public office on April 7. They are: Brian Defferding to the Winnebago County Board; Joe Prohaska to the Appleton city council; and Robert Reynolds to the Edgerton city council.
This news story says that Maine Governor Janet Mills has not relaxed notarization requirements for independent candidate petitions, and that all by itself is a major impediment to petitioning.
Only thirteen states require notarization of petitions for candidates. In Pennsylvania, a U.S. District Court invalidated the requirement that candidate petitions be notarized. Green Party of Pennsylvania v Aichele, e.d., 2:14cv-3299 (decision of March 2, 2015).
Thanks to several people for the link to the Maine news story.