well, when you have 56 votes in the senate and control of the presidency, why settle for less?
Reverse the situation: If the dems had 55 senators, plus the VP, and of course the presidency, would they nominate a stealth candidate and say "trust us", or would they nominate the most liberal candidate they could find?
You can't even trust all of them to do the right thing, let alone fight the good fights when needed, the true Conservatives included. Many of them couldn't find 5 minutes in the day to come to the floor and shoot down the Democrats tactic to filibuster many of Bush's judicial picks.