This filing, directed to Justice Kennedy, could have implications if Trump is short of delegates in June. Right now Democrats could vote in the Republican party primary, and this seeks an order to close the primary. The logistical problem is that Montana has no registration by primary.

It is a very interesting petition.

UPDATE: It’s been pointed out to me that the petition seeks an order to enjoin the open primary, not to mandate a closed primary.  That is, it is possible to fix the problem with the open primary in a number of other ways, such as a convention.

[Headline fixed to reflect this fact]