Perhaps he didn't spend enough time on his vetting process:
So there it is. George Bush is playing politics yet again with our system of government. Rather than hold anyone in his administration accountable for their various atrocities, he would rather pull a rabbit out of the hat for a good hearty distraction. Congratulations America, you elected this sick fucker...TWICE.
Bush accelerated his search for a Supreme Court nominee in part because of special prosecutor Patrick Fitzgerald's investigation into the leak of a CIA agent's name, according to Republicans familiar with administration strategy.
Bush originally had planned to announce a replacement for retiring Justice Sandra Day O'Connor on July 26 or 27, just before his planned July 28 departure for a month-long vacation at his Crawford, Texas, ranch, said two administration officials, who spoke on the condition they not be named.
The officials said those plans changed because Rove has become a focus of Fitzgerald's interest and of news accounts about the matter.