California voters would consider a state-mandated tax on the assets of wealthy residents, one that could generate as much as $1 billion a year for low-income families, under legislation introduced in the state Legislature on Tuesday.

The bill would ask voters next year to impose an estate tax of a size equal to what was loosened in 2017 by President Trump and Republicans in Congress as part of a broad tax overhaul law. The goal, said the proposal’s author, is to create an overall tax burden for wealthy Californians equal to what existed before the federal tax break was created.