Because he approved of her in a private meeting prior to the announcement of her nomination.
The Democrat senators don't want a big fight on this.
Exactly. They know now it hurts the party. They have signaled to Bush that they don't care how conservative the nominee really is; as long as there is some appearance of being a 'moderate', they'll go along. This lets them look reasonably statesmanlike to their constituents and keeps the mowing and gibbering of the moonbat left to a minimum.
But if pushed into a fight, they'll fight. They have stated numerous times they will filibuster Brown (my favorite) or Owens, or anyone with a clear, strong conservative record. There are 36 republican senators and 19 RINOs. The RINOs have stated they will not vote to break a filibuster. Most of the well-known names would not likely get out of the Judiciary Committe.
That's just how it is.
None of the politicians want to fight for principle. That is axiomatic. The GOP Senators don't want a fight. It's unseemly. The President surely doesn't want a fight.
I'd be cool on winning without a fight, but I know for a fact that sequence of events (winning without a fight) is fantasy.