Biden Hunts for Cash to Fund Agenda After Setback on Tax Rates

President Joe Biden’s acknowledgment that he doesn’t have sufficient Senate Democratic backing for his proposed increase in the U.S. corporate tax rate gives fresh impetus to efforts by negotiators to find alternative revenue sources for a sweeping social-spending bill.

There are dozens of potential options mapped out by lawmakers and tax experts to increase the revenue collected from companies, though nearly all of them are more complicated and politically risky than just increasing the top-line rate.

Biden had sought to boost the 21% corporate tax rate, part of President Donald Trump’s signature tax law. But on Thursday night ...