After a half century of rat-f%$#ery and malice, Roger Stone has finally been convicted of lying to Congress.

Given the volume and intensity of his lies over the years, there is a certain symmetry to this:

For decades, Roger J. Stone Jr. played politics as a kind of performance art, starring himself as a professional lord of mischief, as a friend once called him. He tossed bombs and spun tales from the political periphery with no real reckoning, burnishing a reputation as a dirty trickster.

On Friday morning, a reckoning arrived, the consequence of his efforts to sabotage a congressional investigation that threatened his longtime friend President Trump.

Mr. Stone, 67, was convicted in federal court of seven felonies for obstructing the congressional inquiry, lying to investigators under oath and trying to block the testimony of a witness whose account would have exposed his lies. Jurors deliberated for a little over seven hours before convicting him on all counts. Together, the charges carry a maximum prison term of 50 years.

In a last-minute bid for salvation, prosecutors said, Mr. Stone appealed to Mr. Trump for a pardon on Thursday, using a right-wing conspiracy theorist who runs the website Infowars as his proxy. Mr. Trump attacked the guilty verdict against Mr. Stone in a tweet on Friday but made no mention of a pardon.

………

Mr. Stone joins a notable list of former Trump aides who either pleaded guilty or were convicted of federal crimes in cases stemming from Mr. Mueller’s work. It includes Mr. Gates; Michael T. Flynn, the former national security adviser; Michael D. Cohen, the president’s longtime fixer; George Papadopoulos, a former Trump campaign aide; and Paul Manafort, Mr. Trump’s former campaign chairman and Mr. Stone’s onetime partner in a political consulting firm.

This is a guy who literally has a tattoo of Richard Nixon on his back, and now he is going to suffer the fate of Haldeman, Ehrlichman, and Mitchell.