Quick Burger confirmation is defended against critics — June 10, 1969WASHINGTON — Senate Democratic leader Mike Mansfield said today Earl Warren’s desire to break in his successor helped prompt the quick Senate vote confirming Warren E. Burger as chief justice.The Senate confirmed Burger 74 to 3 Monday, but only after five Democratic senators complained the nomination was being rushed through.“All the ultraconservatives in the Senate were gung ho to have this nomination approved without delay,&rdquo …