The measures have also been ratified by Turkish President Abdullah Gul, Erdogan's AKP ally.
The AKP sees the military, judiciary and state bureaucracy as the last bastion of conservative secularism.
If instead the AKP stayed in power, that would bring Islamists closer to the mainstream.
In less than 10 years, the AKP regime has dismantled Turkey's strategic alliance with Israel.
But a senior party member of the AKP, Bekir Bozdag, said the court had overstepped its jurisdiction.
AKP's surviving parliamentarians would remain as independents in sufficient numbers to be able to force another snap election.
The AKP holds onto to power by delivering consistent economic growth, approaching 10% per year, through market-based reforms.
Yet just as in the AKP case, much of the prosecution's argument rests on words rather than deeds.
However, one notable change included the removal of Erdogan's interior minister from one of the AKP's top leadership councils.
When in 2003 the AKP-dominated Turkish parliament prohibited US forces from invading Iraq through Kurdistan, the US blamed itself.
The blueprint was drawn up after the AKP was returned to power for a second five-year term in July 2007.
While we are assured it is a "moderate" religious party, the same has long been said of Turkey's governing AKP party.
In a resounding victory for Erdogan and his ruling Justice and Development Party (AKP), voters approved the 26 amendments by a wide margin Sunday.
Interior Minister Idris Naim Sahin's hawkish stance towards Turkey's long-simmering Kurdish conflict has sparked controversy both within the AKP and throughout Turkey.
"Solving the problem and ending the war would be seen as a positive step for the AKP's election prospects, " Ms Kaya says.
The AKP won the 2002 elections and has since been reelected twice.
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The AKP was handsomely re-elected in 2007 with an increased share of the popular vote, albeit with a reduced parliamentary majority.
This has raised some concerns within Europe that the AKP government is struggling to give renewed momentum to Turkey's EU membership negotiations.
President Abdullah Gul, of the AKP, signed it on 13 May 2010.
The AKP says the reforms will pave the way for a reorganisation of the high courts and help meet requirements for EU membership.
Olmert, Foreign Minister Tzipi Livni and President Shimon Peres have all stated that Israel does not have a problem with AKP's Islamist character.
Erkan Mumcu, a former AKP minister who now heads the center-right Motherland Party, accused the AKP in June of interfering in Central Bank operations.
In May 2005, AKP Parliamentary Speaker B?lent Arin? warned that the AKP might abolish the constitutional court if its judges continued to hamper its legislation.
Governing competently and overseeing an unprecedented economic boom, the AKP saw its share of the electorate grow from one-third in 2002 to one-half in 2011.
The first came last autumn when the AKP was trying to patch together a new constitution to replace the one written by the generals in the 1980s.
Feeling its oats, the AKP abandoned Washington's protective umbrella and struck out on an independent neo-Ottoman course, aiming to be a regional power as in centuries past.
It staged three coups between 1960 and 1980 and has a history of tension with the Justice and Development Party (AKP) of Prime Minister Recep Tayyip Erdogan.
Indeed, since the AKP rose to power in 2002, it has distanced Turkey from both Israel and the US while warming Turkish relations with Iran and Syria.
Sunday's vote is the latest confrontation in a power struggle between Erdogan's Islamist-rooted party and Turkey's secularist establishment, which have repeatedly clashed since AKP swept to power eight years ago.
This week, the Turks went to the polls and re-elected Prime Minister Recip Erdogan and his radical Islamic AKP party to lead the country for a third term.
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