2017 Las Vegas shooting
Niko House, who won the Hawaii Democrat's recent donor challenge, also believes Bill Cosby was framed and that "Pizzagate" is real.
The president had called for the devices to be outlawed following several mass shootings.
A lone gunman killed 58 people and wounded more than 600 others last year.
Your support means more than you think.
“I do this as a gun owner and a proud supporter of the Second Amendment," Sen. Mark Warner wrote.
Authorities in Las Vegas say they cannot "definitively" determine Stephen Paddock's motive in the Oct. 1 mass shooting.
"We could have stopped the guy in Vegas."
A lawyer for the victims slammed the legal maneuver, saying Mandalay Bay's negligence permitted the gunman to prepare his attack.
The campaign organization said Democrats should focus on offering thoughts and prayers.
“My parents never had to talk to me about situations like this," the father said.