Buckle up, buttercup. The fun is just starting.

Ex-Trump lawyer Michael Cohen's public testimony is just a taste of the headaches ahead for Individual 1. Coming up in the weeks ahead: his tax returns. According to NBC News, the House Ways and Means Committee is preparing a request for "years" of Trump's personal tax returns, and Democrats "are prepared to 'take all necessary steps,' including litigation, in order to obtain them."

Committee chair Richard Neal has instructed the committee's attorneys to prepare the request, and with the blessing of Speaker Nancy Pelosi is working with the chairs of the Oversight and Government Reform, Financial Services, Intelligence, and Judiciary committees. Neal is asking those chairs to provide arguments for the necessity of having the returns for their investigations.

Pelosi's spokeswoman Ashley Etienne said the tax returns are necessary, because "Every day the American people and Congress learn more about President Trump’s improprieties, from conflicts of interest to influence peddling, potential tax evasion and violations of the Constitution — all roads leading back to President Trump’s finances." That's an understatement. She said the committees are working together to "ensure the House is able to present the strongest possible case" to the IRS for the returns.

This sets up a potential constitutional conflict, as Treasury Secretary Steven Mnuchin will determine whether or not to grant the request. While Ways and Means is the only committee with jurisdiction to request them, having a united front among the key committees will help make that case.