Colorado lawmakers are wrangling over major changes to how elections are run, including allowing same-day voter registration and mailing ballots to all registered voters.
The Democrat-sponsored bill got its first hearing in a House committee and drew dozens to the Capitol during a snowstorm.
It was unclear whether lawmakers would take a vote Monday evening. But the bill was expected to get initial clearance in the committee controlled by Democrats.
Republicans say Democrats who wrote the bill left GOP leaders out of the process. Democrats say that's not the case.
Republicans also contend the changes are meant to benefit Democrats.
Democrats counter that the goal is to increase voter participation regardless of party affiliation.
The bill would also eliminate the category of "inactive voters," which restricts voters' ability to get mail ballots.