President-elect Donald J. Trump's campaign pledge to dismantle the Dodd-Frank Wall Street Reform and Consumer Protection Act might have struck a chord among voters, but the politics of repealing or replacing it won't be simple. The stakes are high as the CalPERS board debates whether to significantly decrease the nation's largest public pension fund's assumed rate of return, a move that could hamstring the budgets of contributing municipalities as well as prompt other public funds across the country to follow suit.