The House Impeachment Managers filed an 80-page legal brief [link to pdf] to present their case for an article of impeachment against President Trump.
Essentially, the politically determined democrats are using the power of the state to try and block President Trump from holding public office again. Their brief is long on process and short on substance. Lots of table pounding.
In response to the House Managers, the President’s legal team also filed a brief. The much shorter 14-page rebuttal [pdf here] is the basis for the Trump defense.
Here’s the House Trial Brief: