Although he had quarrelled with Thomas Wentworth, 1st Earl of Strafford, who had married his sister, Arabella, in 1641 he opposed the Earl of Strafford's impeachment in the House of Lords, and during the trial asked several questions favourable to his defence. After Parliament sentenced Strafford to death by attainder, he pleaded hard with King Charles I for Strafford's life, but without success.
