18 U.S. Code § 1505. Obstruction of proceedings before departments, agencies, and committees
Whoever, with intent to avoid, evade, prevent, or obstruct compliance, in whole or in part, with any civil investigative demand duly and properly made under the Antitrust Civil Process Act, willfully withholds, misrepresents, removes from any place, conceals, covers up, destroys, mutilates, alters, or by other means falsifies any documentary material, answers to written interrogatories, or oral testimony, which is the subject of such demand; or attempts to do so or solicits another to do so; or
Whoever corruptly, or by threats or force, or by any threatening letter or communication influences, obstructs, or impedes or endeavors to influence, obstruct, or impede the due and proper administration of the law under which any pending proceeding is being had before any department or agency of the United States, or the due and proper exercise of the power of inquiry under which any inquiry or investigation is being had by either House, or any committee of either House or any joint committee of the Congress—
Shall be fined under this title, imprisoned not more than 5 years or, if the offense involves international or domestic terrorism (as defined in section 2331), imprisoned not more than 8 years, or both.
Congress was investigating allegations of crime having been committed by Donald Trump...fact.
Congress issued subpoenas to the white house (and others) seeking more information in which reach a conclusion...fact.
Donald Trump, president of the US, refused to comply, and ordered others to not comply, knowing that doing so is a crime....fact.
Donald Trump committed a crime by violating 18 U.S. Code § 1505....fact.
Regardless of how one feels about the validity of the investigation, how it was brought to light (the whistleblower, etc.), or how the investigation was handled, one thing cannot be denied....Donald Trump committed a crime by refusing to release the information, and allow the testimonies sought by congress, to the investigation.
It shouldn't matter how one feels about the accomplishments of Trump, or about him as a person. What should matter to every American, who believes in the rule of law, is that our president violated that law that we all must abide by (whether we think it justified or not). No one, who believes in the rule of law, should be supporting this president in this matter.