Billionaire Tom Steyer pledges $12 million to support Proposition 50, which could give Democrats five more congressional seats in California.

Charles Munger Jr. has donated $32 million to the opposition, arguing that the measure undermines California’s voter-approved independent redistricting commission.

As California voters receive mail ballots for the November special election, which could upend the state’s congressional boundaries and determine control of the House, billionaire hedge-fund founder Tom Steyer said Thursday he will spend $12 million to back Democrats’ efforts to redraw districts to boost their party’s ranks in the legislative body.

The ballot measure was proposed by Gov. Gavin Newsom and other California Democrats after President Trump urged Texas leaders to redraw thei

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