[4] He studied law at the University College of Wales, Aberystwyth, where he was involved with student politics and served as president of the debating union.

Early in 1955, Morgan was adopted as Plaid Cymru candidate for the Wrexham constituency and contested the seat at the by-election in 1955, and at the general elections in 1955 and in 1959.

In the February 1974 general election, Morgan lost his seat to Liberal candidate Geraint Howells.

[6] On 6 March 2007, Morgan supported the abolition of the blasphemy law in the UK, quoting Richard Dawkins's description of God as "a petty, unjust, unforgiving control freak; a vindictive, bloodthirsty ethnic cleanser; a misogynistic, homophobic, racist, infanticidal, genocidal, filicidal, pestilential, megalomaniacal, sadomasochistic, capriciously malevolent bully".

A deacon in the Presbyterian Church of Wales at Capel-y-Garn in Pen-y-garn, he was making the point that God did not need the protection of the law.

[10] Morgan later supported proposals to expand gay rights, such as the Homosexual Offences (Northern Ireland) Order 1982[10] and the Marriage (Same-Sex Couples) Act 2013.