Now out of favour and with no chance of returning to the judiciary, Coke was re-elected to Parliament as an MP, ironically by order of the King, who expected Coke to support his efforts.
Elected in 1620, Coke sat for Liskeard in the 1621 Parliament, which was called by the King to raise revenues; other topics of discussion included a proposed marriage between the Prince of Wales and Maria Anna of Spain, and possible military support for the King's son-in-law, Frederick V, Elector Palatine.
Coke became a leading opposition MP, along with Robert Phelips, Thomas Wentworth and John Pym, campaigning against any military intervention and the marriage of the Prince of Wales and Maria Anna.
His position at the head of the opposition was unsurprising given his extensive experience in both local and central government, as well as his ability to speak with authority on matters of economics, parliamentary procedure and the law.
He subsequently sat as MP for Coventry (1624), Norfolk (1625) and Buckinghamshire (1628).

In June 1614, the University of Cambridge by unanimous vote elected Coke High Steward, an honorary office immediately below Chancellor of the University.
Through Cecil, (previously High Steward and then Chancellor of Cambridge), Coke had procured for the university the right to send its own two representatives to Parliament, a matter of much practical benefit.
A fervent Cantabrigian, Coke had a habit of naming Cambridge first, including in Parliament.
When reminded that precedence belonged to Oxford "by vote of the House," Coke persisted in giving Cambridge primacy.
 A Privy Councilor, Sir Thomas Edmondes, interrupted with a rebuke.
It was reported that Coke suggested Edmondes not bother worrying about the primacy of Oxford or Cambridge, given that he had not attended either university.
Now out of favour and with no chance of returning to the judiciary, Coke was re-elected to Parliament as an MP, ironically by order of the King, who expected Coke to support his efforts. Elected in 1620, Coke sat for Liskeard in the 1621 Parliament, which was called by the King to raise revenues; other topics of discussion included a proposed marriage between the Prince of Wales and Maria Anna of Spain, and possible military support for the King's son-in-law, Frederick V, Elector Palatine. Coke became a leading opposition MP, along with Robert Phelips, Thomas Wentworth and John Pym, campaigning against any military intervention and the marriage of the Prince of Wales and Maria Anna. His position at the head of the opposition was unsurprising given his extensive experience in both local and central government, as well as his ability to speak with authority on matters of economics, parliamentary procedure and the law. He subsequently sat as MP for Coventry (1624), Norfolk (1625) and Buckinghamshire (1628).
In June 1614, the University of Cambridge by unanimous vote elected Coke High Steward, an honorary office immediately below Chancellor of the University. Through Cecil, (previously High Steward and then Chancellor of Cambridge), Coke had procured for the university the right to send its own two representatives to Parliament, a matter of much practical benefit. A fervent Cantabrigian, Coke had a habit of naming Cambridge first, including in Parliament. When reminded that precedence belonged to Oxford "by vote of the House," Coke persisted in giving Cambridge primacy.  A Privy Councilor, Sir Thomas Edmondes, interrupted with a rebuke. It was reported that Coke suggested Edmondes not bother worrying about the primacy of Oxford or Cambridge, given that he had not attended either university.
Edward Coke