I believe these OBVIOUS FAKE push polls are for the upcomming USSC nomination.
These are not done for anyone but those INSIDE THE BELTWAY. For those congress critters who do not live in the real world.
They don't have to influence REAL people only those who live the the DC Menatal Vacume.
I think you have hit the nail on the head. A lot of these polls are to cause division in the Congressional ranks. A secondary reason for the concentration on the polls is to affect the 2006 elections. If they think they can diminish GW's popularity, then perhaps he won't be such an asset in campaigning for congressional and senate candidates.