Sen. Bernie Sanders Bernie SandersButtigieg stands in as Pence for Harris's debate practice Bernie Sanders warns of 'nightmare scenario' if Trump refuses election results Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (I-Vt.) will deliver a "major speech" on Wednesday night about the direction of the country under President-elect Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE as he continues to frame himself as a chief antagonist of the incoming Republican president.

Sanders is speaking at George Washington University in Washington, D.C., at 7 p.m. as part of a tour promoting his new book, "Our Revolution: A Future to Believe In." His new political organization, Our Revolution, is live-streaming the event and sending it out to Sanders supporters online.

"Bernie Sanders is going to give a major speech on Wednesday night about the future of our country under the presidency of Donald Trump," read the email to supporters.