Jabarkan Self-exile dari Konstantinos Karamanlis

In the 1961 elections, the National Radical Union won 50.80 percent of the popular vote. On 31 October, George Papandreou stated that the electoral results were due to widespread vote-rigging and fraud. Karamanlis replied electoral fraud, to the extent that it happened, was masterminded by the Palace. Political tension escalated, as Papandreou refused to recognize the Karamanlis government. On 14 November 1961 he initiated an "unrelenting struggle" ("ανένδοτο αγώνα") against Karamanlis.

Tension between Karamanlis and the Palace escalated even further as Karamanlis vetoed fundraising initiatives undertaken by Queen Frederika. On 17 June 1963 Karamanlis resigned the premiership after a disagreement with King Paul of Greece, and spent four months abroad. In the meantime the country was in turmoil following the assassination of Dr. Gregoris Lambrakis, a leftist member of Parliament, by right-wing extremists during a pro-peace demonstration in Thessaloniki. The opposition parties castigated Karamanlis as a moral accomplice to the assassination.

In the 1963 election the National Radical Union, under his leadership, was defeated by the Center Union under George Papandreou. Disappointed with the result, Karamanlis fled Greece under the name Triantafyllides. He spent the next 11 years in self-imposed exile in Paris, France. Karamanlis was succeeded by Panagiotis Kanellopoulos as the ERE leader.

In 1966, Constantine II of Greece sent his envoy Demetrios Bitsios to Paris on mission to convince Karamanlis to return to Greece and resume a role in Greek politics. According to uncorroborated claims made by the former monarch only after both men had died, in 2006, Karamanlis replied to Bitsios that he would return under the condition that the King were to impose martial law, as was his constitutional prerogative.

U.S. journalist Cyrus L. Sulzberger has separately claimed that Karamanlis flew to New York to visit Lauris Norstad and lobby U.S. support for a coup d'état in Greece that would establish a strong conservative regime under himself; Sulzberger alleges that Norstad declined to involve himself in such affairs.

Sulzberger's account, which unlike that of the former King was delivered during the lifetime of those implicated (Karamanlis and Norstad), rested solely on the authority of his and Norstad's word.

When in 1997 the former King reiterated Sulzberger's allegations, Karamanlis stated that he "will not deal with the former king's statements because both their content and attitude are unworthy of comment."

The deposed King's adoption of Sulzberger's claims against Karamanlis was castigated by left-leaning media, typically critical of Karamanlis, as "shameless" and "brazen". It bears noting that, at the time, the former King referred exclusively to Sulzberger's account, to support the theory of a planned coup by Karamanlis, and made no mention of the alleged 1966 meeting with Bitsios, which he would refer to only after both participants had died and could not respond.

On 21 April 1967, constitutional order was usurped by a coup d'état led by officers around Colonel George Papadopoulos. The King accepted to swear in the military-appointed government as the legitimate government of Greece, but launched an abortive counter-coup to overthrow the junta eight months later. Constantine and his family then fled the country.