ActBlue C.E.O. Agrees to Testify Before Congress About Foreign Donor Vetting

The Democratic fund-raising group, which backs candidates up and down the ballot, has been the subject of scrutiny by Republicans.

With Orders, Investigations and Innuendo, Trump and G.O.P. Aim to Cripple the Left

The president and his allies in Congress are targeting the financial, digital and legal machinery that powers the Democratic Party and much of the progressive political world.