(CNN) Sen. Elizabeth Warren has unveiled a comprehensive plan to reduce gun violence by enacting a suite of new restrictions on buyers, cracking down on sellers and breaking "the (National Rifle Association's) stranglehold on Congress" with anti-corruption legislation.

The proposal arrives as more than 15 Democratic primary candidates prepare to take turns speaking at a gun safety forum in Des Moines, Iowa, and a week after the mass shootings in El Paso, Texas and Dayton, Ohio

"The next President has a moral obligation to use whatever executive authority she has to address the gun crisis," Warren writes in a Medium post. "But it is obvious that executive action is not enough. Durable reform requires legislation -- but right now legislation is impossible. Why? A virulent mix of corruption and abuse of power."

Warren previously described gun violence in America as "a national health emergency" and has, on the campaign trail, called questions about how to keep children safe from school shooters among the most troubling she's faced as a candidate. On Saturday, she pledged again to end the Senate filibuster, which she describes in her new post as weapon used by "extremists in the Senate to thwart the will of the people."

The new plan is among Warren's broadest to date, calling for universal background checks, the passage of a federal ban on assault weapons and high-capacity magazines, and the closure of loopholes often targeted by gun control activists.