Vice President Pence penned a new op-ed in the Wall Street Journal on Thursday, calling for Senate Democrats to acquit President Trump in the upcoming impeachment trial.

Retelling the story of President Andrew Johnson’s impeachment, Pence highlighted then-Senator Edmund G. Ross’s decision to break with the Republican party and vote to acquit Johnson.

“But at the close of the trial on May 16, 1868, he stayed true to his convictions, opposed the passions of his own party, and voted to acquit Johnson. He faced social ostracism and physical assault. Still, he knew he was right,” Pence wrote.

Pence goes on in the piece to compare Johnson’s impeachment to Trump’s, and calls on Democrats to buck their party and acquit the president in the same way as Ross.

Read more at The Hill.