Does the fact that less people believed that Saddam Hussein was involved with 9/11 during the alleged propaganda campaign than before the alleged campaign mean that the campaign, if there was a campaign, support the assertion that it was brilliant and highly successfull?

It was from Bobert's source of the truth, the Washington Post.
        
Washington Post Poll:
Saddam Hussein and the Sept. 11 Attacks

Saturday, September 6, 2003

The latest Washington Post poll is based on telephone interviews with 1,003 randomly selected adults nationwide, and was conducted Aug. 7-11, 2003. The margin of sampling error for overall results is plus or minus 3 percentage points. Sampling error is only one of many potential sources of error in this or any other public opinion poll. Interviewing was conducted by TNS Intersearch of Horsham, Pa.

*= less than 0.5 percent

How likely is it that Saddam Hussein (INSERT ITEM) ? Would you say that it is very likely, somewhat likely, not very likely, or not at all likely?

                                  --------Likely------- -------Not Likely------   No
                                  NET   Very   Somewhat NET   Not very   At all opin.
a. was personally involved in
   the September 11 terrorist
   attacks                         69    32       37      28      15       12      3
b. has provided assistance to
   Osama bin Laden and his
   terrorist network               82    51       31      14       8         6      4
c. was trying to develop weapons
   of mass destruction             84    62       22      14       9         5      3
d. had already developed weapons
   of mass destruction             78    51       27      19      12         7      3

a. was personally involved in the September 11 terrorist attacks

               --------Likely------- -------Not Likely------   No
               NET   Very   Somewhat NET   Not very   At all opin.
8/11/03         69    32       37      28      15       12      3
2/6/03*         72    34       38      25      16         9      3
10/24/02       71    34       37      25      16         9      4
9/13/01#       78    34       44      12       9         3      9

* 2/6/03 and previous - Time/CNN. "…personally involved in the terrorist attacks
(on the World Trade Center and the Pentagon) on September 11th (2001) -- very likely,
somewhat likely…"
# "How likely is it that Saddam Hussein is personally involved in Tuesday's terrorist
attacks..."
b,c,d. No trend.