...any American who is faithful to the Constitution could easily answer this question:
Trump and this administration have certainly tested the constitution on many occasions.
Some people have learned:
The sitting president cannot be indicted.
It might not be fair for an official prosecutor to even accuse the sitting president of a crime given he has no legal means of challenging an accusation.
The president and white house can stop people from complying with congressional subpoenas
A Senate Trial can be held even without witnesses or evidence. The senate can block the house representatives from calling witnesses and from presenting documents or evidence in a senate trial.
The president and white house can retaliate against testifying witnesses by demoting them and firing them.
The president can publicly and openly threaten members of trial jury
The president can publicly and openly threaten witnesses while they testify to congress.
The president can publicly and openly try to out anonymous whistle blowers without repercussions to the president.
The president can fire any and all attorneys or inspector generals or FBI directors who are involved in investigating him or his friends or accomplices.
The president can commute sentences of people who recently protected the president from investigations
It is highly unlikely that any impeachment will result in the removal of a sitting president
The attorney general can withdraw charges against the president's friend/accomplice even if that person pled guilty.