SACRAMENTO, Calif. (AP) – A Republican effort to repeal California’s upcoming gas tax increase is getting a financial boost from GOP gubernatorial candidate John Cox and the support of several members of Congress. Cox says he’ll pour a “significant” amount of money into the effort to gather the more than 500,000 signatures needed to put the repeal effort on the ballot. He is declining to say how much. California Republican U.S. Reps. Mimi Walters and Doug LaMalfa are backing the effort. The gas tax will go up 12 cents per gallon in November. The initiative would repeal it and require all future gas and car tax increases to go before voters. A coalition of business groups say the tax increase is badly needed to help repair California’s deteriorating roads and bridges.