Hillary Clinton

It isn't that states don't have primaries. They all do. It is just that half of them have their primaries later in the year so they have caucuses. Washington and Nebraska still had voting for president even though caucuses had already been held. So for states that already have primaries during the presidential primary season they should use primaries instead of caucuses. That would reduce the number of caucus states from 14 to 7. Colorado and Hawaii would should be friendly to the idea of having their regular primary earlier so that it could also include the presidential. That would reduce it down to 5 states that might only do it as a caucus. All red states.

If they make no real effort to change the system then yes their delegates should be reduced. Actually, they just won't get bonus delegates. Their regular delegates that are based on voter turnout for the Democratic President would still remain. The current method of delegate allocation is based on incentives. Besides voter turnout for Democratic President states also have delegates based on whether they have a Democratic Governor or congressional member.

These are the states that had caucuses:
Alaska
Colorado
Hawaii
Idaho
Iowa (June 7)
Kansas
Maine (June 14)
Minnesota (changed to primary in 2020)
Nebraska (May 10)
Nevada (June 14)
North Dakota (June 14)
Utah
Washington (May 6)
Wyoming

The dates are when they held other primaries that were no later than the primary DC had. All other states held regular primaries later.