The new measure requires certain BB and pellet guns to come with bright markings.
The Democratic presidential candidate's latest policy proposal is a shot at rival Bernie Sanders.
"Even people that believe in the right to bear arms, what right do you have to take someone's life?"
Umpqua's student handbook says firearms are prohibited on college property "except as expressly authorized by law or college regulations."
Investigators had previously said the Umpqua Community College shooter was killed by officers.
Friend Danielle Haines shares memories of the "all-around friendly guy."
Her husband talks about the woman who was lost in Oregon's worst mass shooting.
One of the victims was the great-granddaughter of Oregon Senator Jeff Merkley's first cousin, he said on Friday.
Nine people were killed and seven were injured at Umpqua Community College in Oregon on Thursday.
Many of the 20 presidential candidates joined in on the social media conversation.
A gunman opened fire at Umpqua Community College in Oregon earlier on Thursday.
A gunman on Thursday opened fire at Umpqua Community College in Roseburg, Oregon.