It’s no surprise Republicans hate the taxes President Joe Biden has proposed to pay for his sweeping economic agenda. According to House Republicans, the White House’s proposal to raise the corporate tax rate from 21 to 28 percent “cuts employment” and “slows economic growth,” thus “harming U.S. economic competitiveness and increasing the cost of investment in America.” To make their case, Republicans come bearing receipts: a 2021 study from the Tax Foundation, the self-described “leading independent tax policy nonprofit.” But a look at some of the backers of this nonprofit suggests that “independent” has nothing to do with non-partisan.