Members of Moms Demand Action for Gun Sense in America are holding their second annual "Moms Take the Hill" event at Capitol Hill on Wednesday as part of their "Week of Action," USA TODAY reported.

Activists in the group -- formed after the Sandy Hook shooting -- will be traveling D.C. to urge members of Congress to support universal background checks.

"We are taking this fight to the states," Shannon Watts, founder of group, told USA TODAY. "What we want Congress to know is that we are watching them, but we are not waiting for them. We are getting ready for the midterms and we are going to hold them accountable for their failure to act."

Additionally, group members have been holding house parties in their home states to expand the mission and grow nationwide support.

The group now has chapters growing in each state, compared to last year when they only had a few to count.

Moms Demand Action recently joined forces with Mayors Against Illegal Guns to form Everytown for Gun Safety, to which former New York City Mayor Michael Bloomberg donated $50 million.

"You've got to work at it piece by piece," Bloomberg told the Times. "One mom and another mom. You've got to wear them down until they finally say, 'Enough.'"

Larry Pratt, executive director of Gun Owners of America, is not impressed by the group's collective effort.

"We invite him to waste his money," Pratt told USA TODAY. "That group isn't going to do anything he promises."

"Background checks are a complete and total waste of time and money," he added. "They aren't going to stop bad guys getting guns."

The National Rifle Association (NRA) has not commented on the group's rally but has consistently fought against curbing gun sales, USA TODAY said.

"The NRA's 5 million members and America's 100 million gun owners will not back down - not now, not ever ... mark my words: The NRA will not go quietly into the night. We will fight," Executive Vice President Wayne LaPierre said in a prepared statement at a recent event in Indianapolis. "History has proven again the truth that President Obama and the anti-freedom activists everywhere deny and try to suppress the truth that firearms in the hands of good people save lives."

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