Obama's absurd last ditch push on gun control

Normally I would say that you can tell when a politician is getting desperate because he starts making absurd unjustifiable claims.  The problem with Obama is that he is always making such ridiculous claims.  Take this one by him on Monday:

“What’s more important to you: our children or an A Grade from the gun lobby?” Obama, wearing a green bracelet to honor the Sandy Hook victims, said in his speech. . . .

But does anyone believe that these background checks would have stopped the Sandy Hook attack?  How could the background checks in Harry Reid's bill possibly have stopped the attack when the guns were stolen?