In 1996 he ran unopposed. So I take it you have a problem with that.
The DNC did not close or cancel the primaries in 1996, you have that wrong.
Proposed 1996 candidates trying to primary Bill Clinton were Bill
Lyndon LaRouche, Activist from Virginia and Jimmy Griffin, Former Mayor of Buffalo from New York.
If Clinton ran unopposed what were Lyndon LaRouche and Jimmy Griffin doing?
ARIZONA
Primary Election: March 9, 1996*
Clinton D 12,303 95.49
No Preference D 581 4.51
Total Party Votes: 12,884
Primary Election: February 27, 1996
Forbes, Steve R 115,962 33.37
Dole, Bob R 102,980 29.64
Buchanan, Patrick J. "Pat" R 95,742 27.55
Alexander, Lamar R 24,765 7.13
Keyes, Alan L. R 2,790 .80
Lugar, Richard G. R 2,064 .59
Gramm, Phil R 857 .25
Dornan, Robert K. R 735 .21
Ducey, Susan R 539 .16
Jennings, Ann R 304 .09
Taylor, Morry R 148 .04
Pharr, Joann V. R 125 .04
Hewitt, Kenneth R 104 .03
Jensen, Paul R 99 .03
Fricke, Doug R 64 .02
Levinson, Michael S. R 59 .02
Patty, Hubert David R 55 .02
Holden, Charles R 38 .01
Staggs, Clyde R 33 .01
Aldrich, C.A. R 19 .00
Total Party Votes: 347,482
Total State Votes: 347,482
* The Arizona Democratic Party held its own primary on March 9, 1996.If the DNC did not close any primaries why did the Arizona decide to have it's own primary some two weeks after the Republican primary was held? When states have Presidential primaries there are held on the same day.
https://transition.fec.gov/pubrec/fe1996/presprim.htm#top