Senate Majority Leader Harry Reid, pushing for fast action on the stimulus bill, turned to a well-worn maxim: "We should not let the perfect be the enemy of the good." The bill the Senate is expected to send to a conference committee as soon as Tuesday includes provisions -- particularly the $69.8 billion one-year "patch" on the alternative minimum tax (AMT) -- that key economists and budget specialists say are less likely to have the maximum anti-recessionary impact than direct spending provisions calling for substantial purchases by all levels of government. The Senate has compounded the weaknesses in the bill by sharply cutting what economists agree are essential ingredients of a stimulus bill, including $40 billion in aid to states and $16 billion for school construction. The reaction to the changes adopted at the behest of a small but key group of "centrist" Senators -- Maine Republicans Susan Collins and Olympia Snowe, Ben Nelson (D-NE) and Arlen Specter (R-PA) -- was strong. "The compromise is worse than the original bill because it is smaller, and the changes appear to have reduced rather than increased the bang-for-buck effectiveness of the bill," said Berkeley economist J.