I saw the Tweet below, and without actually reading the article, I can tell you it's wrong.
The reason for that is that Mother Jones is assuming that if Obama says he doesn't want a gun registry, he's telling the truth.
Also, while I believe I am safe in assuming bad faith on the part of President Obama, based on his record, Mother Jones has no business assuming that on the part of the NRA.
I don't assume bad faith on the part of Mother Jones, I think they're telling the truth as they say see it. That's because they're a group of ignorant, biased, and credulous leftists, and once again, that's based on their record.