The outcome of former President Donald Trump’s second impeachment trial is all but certain. He will be, barring a startling development, acquitted on a charge of inciting insurrection. But the proceeding itself will raise a slew of questions about the Republican Party he has led for the last four years.

But the evidence laid out by prosecution and defense, details of the actions of Trump supporters during the Jan. 6 Capitol riot, questions raised by senators, and the final vote tally will each offer insight into the direction of a party grappling with its post-Trump direction.