To the below comment, I do believe courts have interpreted and created law which applies to Trump's words and actions, specifically on reasonable restrictions to speech which incites, creates, has immediate danger.

Trump's actions and words fit that and he is culpable for the actions resulting from his words.

On the actual law surrounding the consequences of his speech and attempts to subvert our Government and Democracy

Fourteenth Amendment Section 3 No person shall be a Senator or Representative in Congress, or elector of President and Vice-President, or hold any office, civil or military, under the United States, or under any State, who, having previously taken an oath, as a member of Congress, or as an officer of the United States, or as a member of any State legislature, or as an executive or judicial officer of any State, to support the Constitution of the United States, shall have engaged in insurrection or rebellion against the same, or given aid or comfort to the enemies thereof. But Congress may by a vote of two-thirds of each House, remove such disability.

Law specific says incites https://uscode.house.gov/view.xhtml?path=/prelim@title18/par...