Two Nevada Republican Assemblymembers have introduced AB 302, which moves the primary from June to January.  It also would establish a presidential primary in Nevada, on the same January date.  Currently Nevada has a caucus to choose delegates to major party national conventions, not a presidential primary.

Nevada already was permitted by the Democratic and Republican Party rules to hold a caucus in February.  Nevada is one of four states that have the right to hold early processes.  But this Nevada bill, if enacted, would violate national party rules.  Josh Putnam at this link explains the various ramifications if this bill passes.

The bill would not change the petition deadlines for newly-qualifying parties or independent candidates.