“I said I don’t agree with him on that, but let’s keep it civilised, whichever way the people go,” he added.
Mr Newsom has claimed his plans will “defend our democracy” after Mr Trump urged Republicans to secure additional seats via redistricting. His call has been taken up by states such as Texas and Missouri.
A poll by the Public Policy Institute of California showed some 56 per cent of voters planned to support Proposition 50 next week.
Despite California’s legacy of non-partisan districting, the well-funded “Yes to 50” campaign has cut through by capitalising on opposition to Mr Trump in the state, where the president is broadly unpopular.
The fight has also further raised the profile of Mr Newsom, who is considered a frontrunner to claim the 2028 Democratic presidential nomination.
