House speaker blamed the Senate majority leader for not allowing a vote on a bill passed by Congress extending background checks.
The NRA, which includes millions of Americans, says it was targeted and unlawfully "blacklisted" by San Francisco.
Actor unveils latest artwork showing $100 bill dipped in blood as gun deaths in U.S. hit 10,000 this year.
"You are single-handedly putting our democracy at risk. This is why the people are calling you Moscow Mitch," ex-Trump supporter David Weissman wrote.
In response to a request for comment, Ackerman steadfastly denied the charges in a statement to Newsweek.
The chief NRA lobbyist for Florida said, "How do you tell a 10-year-old little girl who got a Ruger 10/22 with a pink stock for her birthday that her rifle is an assault weapon?"
"When you're president because of a grand total of less than 78,000 votes spread out over three states, you don't have to alienate too much of your base on an issue they care about to lose," warned conservative radio host Steve Deace.
A poll by Fox News reveals declining support for the NRA among Americans and also gun-owning households as President Donald Trump mulls new gun control legislation.
"I can tell you, there's tremendous goodwill for meaningful—I'm talking about meaningful, add that word—meaningful background checks so that sick and demented people don't carry around guns," said Trump, who also confirmed he was speaking with the NRA.
NRA's leader told the president that background check legislation would hurt his popularity with the Republican base and urged him to reconsider his position, according to officials.
"I feel I have a unique perspective from my knowledge as a former Republican and the information I've learned in my journey," Weissman said. "I feel I can help with the gun culture problem."
President Donald Trump is reportedly considering tougher background checks on gun purchases but faces Republican opposition to meaningful reform.
"Hatred can be concealed by our acceptance of #WhiteNationalism and malice will be revealed in our cashing of NRA checks and failure to act," one Twitter user wrote.
Senate majority leader trends on Twitter for the second time in a week following mass shootings in Texas and Ohio.
"Trump just deleted all of these tweets that called immigrants 'invaders,'" Holly Figueroa O'Reilly tweeted.
After 20 children were killed, Wayne LaPierre was criticized by many for his proposal to arm security guards to protect schools.
"I am requesting the National Rifle Association of America (NRA) make public documents that can help determine if wrongdoing by the NRA has occurred," he wrote.
Firebrand anchor Dana Loesch made a number of incendiary remarks while appearing on NRATV.
The National Rifle Association will shut down production of NRATV on Wednesday, according to The New York Times.
Tax experts warn that the reported payments could represent conflicts of interest.
"Gov. Northam is following the gun control playbook by exploiting a tragedy to push his failed political agenda," the group said.
"To suddenly split the two in this really acrimonious dispute certainly leaves the NRA without the kind of institutional management they've come to rely on," one analyst said.
The NRA claims the bill is necessary to prevent property from being looted in the aftermath of hurricanes and other disasters.
Law enforcement officials were apparently unaware that an op-ed they were asked to put their names to was written by the NRA.
Democrats on the House Ways and Means Committee are calling for a probe of the gun rights group after numerous allegations of financial misconduct emerged.
The proposals would incur significant opposition from Republican lawmakers and organizations like the National Rifle Association.
Democrats on the Senate Finance Committee said that the allegations of financial wrongdoing could violate the NRA's nonprofit, tax-exempt status.
Donald Trump Jr. has taken his repeated claims of social media censorship one step further, accusing Instagram "gods" of deleting his photographs solely because he appears in them.