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Sen. Marco Rubio (R-Fla.) pushed back this morning on President Obama's new push for tighter restrictions on gun purchases.

Obama will formally announce today that he will take executive actions to expand background checks.

At the centerpiece of Obama's plan is a more sweeping definition of gun dealers that the administration hopes will expand the number of gun sales subject to background checks.

At gun shows, websites and flea markets, sellers often skirt that requirement by declining to register as licensed dealers, but officials said new federal guidance would clarify that it applies to anyone "in the business" of selling firearms, FoxNews.com reported.

Rubio said the effort by Obama is part of his "obsession" with undermining the Constitution, specifically the Second Amendment.

He said Obama has been trying for years to "make it harder for law-abiding people to buy weapons or protect their homes and their families."

Rubio argued that the actions will do nothing to reduce gun violence or keep firearms away from criminals. 

Bill Hemmer asked whether these actions by Obama will really be a burden to law-abiding Americans who want to own a gun.

"It will burden some people, absolutely. There are individuals who are not major merchants but they sell guns in a small-scale way. You're going to burden them with having to undergo the background check," said Rubio, adding that if a gun seller "misses a step along the way" they could go to prison.

Watch the interview above.

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