The Jan. 6 select committee plans to make its most complex case yet at its public hearing Tuesday: that Donald Trump’s words and actions influenced extremists and brought them to the steps of the Capitol.

“Be there. Will be wild,” Trump tweeted on Dec. 19, 2020, barely two weeks before a mob seeded with members of the far-right Proud Boys and Oath Keepers besieged the Capitol and threatened the transfer of power to Joe Biden. That tweet will be the focal point of the Jan. 6 panel’s seventh public hearing, as House investigators aim to show that the former president’s most extreme supporters were intently listening — and quickly began preparing for potential violence in support of Trump’s goal to stay in power.

The tweet was a “clarion call” to the groups, said Rep. Stephanie Murphy (D-Fla.), who is leading Tuesday’s hearing along with Rep. Jamie Raskin (D-Md.).

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“We’ll show you how they began to organize around that date,” she said in an interview. “And you know that they were [not] organizing … for a peaceful protest, because you don’t bring explosives and weapons to peaceful protests.”

Tuesday’s hearing will require investigators to delve into the sordid world of internet extremism and specifically lay out how Trump’s words rippled through its corners.