Washington (CNN) Democratic presidential candidate Kamala Harris said Monday that congressional action on gun control sits "literally in the hands" of Senate Majority Leader Mitch McConnell after two mass shootings in the US have left at least 31 dead.

"This is, actually, literally in the hands of one person in terms of this legislative action, and it's Mitch McConnell," Harris told CNN's Wolf Blitzer on "The Situation Room." "And I would hope and pray that he understands that he actually has the power to do the right thing here and that he will do the right thing. But it doesn't sound like he's prepared to do that."

"That's irresponsible," said Harris, a senator from California.

Harris spoke Monday at a conference for UnidosUS, which calls itself the largest Hispanic civil rights organization in the US. Describing her conversations with voters, Harris said there is a "heightened volume" of concern among the group. The alleged shooter in El Paso is believed to have authored a racist, anti-immigrant document targeting Hispanics.

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