Just months into her second term, state Sen. Sonya Jaquez Lewis abruptly resigned Tuesday amid an investigation into allegations that she mistreated legislative staff. Why it matters: The Longmont Democrat is a longtime lawmaker and a key part of the Democratic majority that controls the Senate agenda.

State Sen. Sonya Jaquez Lewis abruptly announced her resignation from the Colorado Legislature on Tuesday amid an ethics investigation into her alleged yearslong mistreatment of her Capitol staffers.

In December, an association of legislative aides at the Colorado State Capitol demanded that she resign and accused her of mistreating aides repeatedly.