The move concerns medical marijuana advocates, who say it could prevent patients from vaping prescription cannabis in their apartments.
However, as more young people use alcohol and marijuana, they're also regarding those two substances as less dangerous.
Unlike previous sessions, Democrats can now propose and pass their own health care agenda.
Federal officials are scrambling to reverse a recent explosion in teen vaping that public health officials fear could undermine decades of declines in tobacco use.
When state voters legalized recreational marijuana through Amendment 64 earlier this decade, the e-cigarette industry had just started to take off.
Skyrocketing youth use of e-cigarettes, especially Juuls, has led to several government regulations around teen vaping.
Colorado is becoming an epicenter in the fight over teen vaping.
The new rules would also tighten regulations on online sales.