This section of the AP article on yesterday's ruling is quite revealing:
Obama has voted to leave gun-makers and dealers open to lawsuits. He also took largely liberal positions on gun laws while in the Illinois legislature, including backing a ban on all forms of semiautomatic weapons and tighter state restrictions generally on firearms.A ban of all semiautomatic weapons? That's probably close to 60 or 70 percent of all guns. That is hardly supportive of the 2nd Amendment.