The California Teachers Association has ponied up $7.5 million to fight Proposition 32.
The November ballot measure prohibits the use of payroll-deducted funds for political purposes, eliminating labor unions' primary way of raising money for campaigns and other political spending. It also bans direct campaign contributions by corporations and unions.
The contribution, reported Friday in a campaign finance filing on the secretary of state's website, brings the total raised by the opposition campaign this year to more than $16 million. The No on 32 committee reported having $6.5 million in the bank as of June 30, though that balance doesn't count this check or other contributions received in the last month.
Supporters of the measure, who say it will take special interest money out of politics, have raised more than $2.2 million to date. They ended June with a little more than $1 million in the bank.