Whoever knowingly alters, destroys, mutilates, conceals, covers up, falsified, or makes a false entry in any record, document, or tangible object with the intent to impede, obstruct, or influence the investigation or proper administration of any matter within the jurisdiction of any department or agency of the United States or any case filed under Title 11, or in relation to or contemplation of any such matter or case, shall be fined under this title, imprisoned not more than 20 years, or both.
From the Mueller report:
“Our investigation found multiple acts by the President that were capable of exerting undue influence over law enforcement investigations, including the Russian-interference and obstruction investigations,” Mueller wrote. “The incidents were often carried out through one-on-one meetings in which the President sought to use his official power outside of usual channels. These actions ranged from efforts to remove the Special Counsel and to reverse the effect of the Attorney General’s recusal; to the attempted use of official power to limit the scope of the investigation; to direct and indirect contacts with witnesses with the potential to influence their testimony.”
What the Mueller report says about obstruction