If Congress won't work with her, Senator Harris plans to go it alone on an assault weapons ban should she ascend to the White House next fall.
"I want to get rid of that fear," said Representative Eric Swalwell, who launched his campaign for the Democratic presidential nomination last week.
AR-15s and large-capacity magazines are beyond the scope of the Second Amendment and may be banned, the court ruled.
Republican Kelli Stargel opposed a ban on assault weapons.
The motion comes less than a week after a gunman killed 17 people at a Florida high school.
The court found that military-style assault weapons and large-capacity magazines are not protected under the Second Amendment's right to bear arms.
Cluster bombs, chemical weapons and other banned weapons are now commonplace.
The Senate rejected four gun proposals in the wake of the Orlando massacre. Now what?
Top court may decide this week whether to hear challenges to laws in Connecticut and New York that ban semiautomatic weapons.
A group challenged an ordinance in Highland Park, Illinois, that bans assault weapons and large-capacity magazines.
There is an easy solution to America's arguments about gun control, but the childish extremists on both sides need to leave the room.