Bernie lost among democrats 54-46% according to exit poll. All primaries should be closed primaries

[JimDandy]

63. Unfortunately, the Repub party in Idaho actually did force the state to register voters by party

in 2011. They filed suit and won:

IDAHO REPUBLICAN PARTY v. YSURSA, BEN In his Official Capacity as Secretary of State of the State of Idaho

INTRODUCTION
This case presents the question whether the State of Idaho’s use of an open primary system to determine nominees for the general election violates the Idaho Republican Party’s First Amendment rights. Because the open primary permits substantial numbers of independent voters, as well as voters associated with other political parties, to “cross over” and participate in the Republican Party’s selection of its nominees, the Court concludes that, by mandating such a nomination process, the State violates the Party’s constitutionally guaranteed right to freedom of association.

http://www.sos.idaho.gov/ELECT/ClosedPrimaryOrder.pdf

The defendant, a Republican, didn't put up much of a fight for the people of the State of Idaho.

That is why instead of 22 states that don't register voters by party, there are now only 21:

Alabama -- open primary
Arkansas -- open primary
Georgia -- open primary
Hawaii -- open caucus
Illinois -- semi-open primary
Indiana -- open primary
Michigan -- open primary
Minnesota -- open caucus
Mississippi -- open primary
Missouri -- open primary
Montana -- open primary
North Dakota -- open caucus
Ohio -- semi-open primary
South Carolina --open primary
Tennessee -- open primary
Texas -- closed caucus
Utah -- closed primary
Vermont -- open primary
Virginia -- open primary
Washington -- open caucus
Wisconsin -- open primary