Biden could decide, for example, to return to a campaign promise to ask the country's wealthiest households to contribute more in personal income taxes or lobby to increase the federal gasoline tax.
Other funding ideas include a so-called mileage tax and better monetization of the U.S. electrical grid. Democrats may ultimately lean on a special class of bonds to finance their spending plans despite objections from the GOP and concerns about the growing national debt.
While both parties agree that the U.S. is in dire need of infrastructure repair, the GOP has thus far opposed the Biden plan for funding too many projects beyond what they consider critical infrastructure.