During a CNN “townhall” the President told a rape victim that nothing he is proposing is going to make it harder for a citizen to buy a gun:

https://youtu.be/7ay0pMVMpHE?t=1m49s

During the same meeting he said that he wants to make it harder and more expensive to get a gun in order to make sure fewer people have them.

Making guns harder and more expensive to get will have a disproportionate effect on poor people. This is not only an attack on gun buyers but more specifically poor gun buyers. Poor people are usually the ones who need a gun the most because they generally live in a higher crime area. They have a limited amount of purchasing power already. A $25 dollar tax on firearms, like the one Seattle passed, may not seem like a lot of money but it is significant to someone living near or below the poverty line. Making guns more expensive is tantamount to a poll tax only this time it will affect those with less economic advantage rather than those with a different skin color.