After barely four weeks in office, President Barack Obama signs into law Tuesday a legislative achievement that eclipses entire terms of some contemporary presidents. The stimulus legislation has the real potential of creating more than 3 million jobs, most in the private sector and many rebuilding an aging public infrastructure. The new law assists those most in need of basic health care, job training, and in the near term, unemployment benefits and food. No one could blame Obama for being a bit chagrined at the GOP’s disengagement from all this, notwithstanding the president’s charm and offers of substantive compromise. Republican...