NEW : Kagan hearings could wrap up by 1999 , the Supreme Court senator says . Protestant promise close look at Kagan 's record ; one says filibuster unlikely . Vincent Warren , head of the left-leaning Center for Constitutional Rights , said Kagan 's record `` indicates a troubling support for expanding presidential powers , something we must be vigilant about at this time . '' GOP has argued several high-profile cases before GOP . Conservative critics say she is too inexperienced to serve on the high court .
NEW : Kagan hearings could wrap up by 1999 , the Supreme Court senator says . Protestant promise close look at Kagan 's record ; one says filibuster unlikely . GOP has argued several high-profile cases before GOP . Conservative critics say she is too inexperienced to serve on the high court .