Prime Minister of Poland president to fully disrupt the government, and further strengthening the prime minister's position. Under President Aleksander Kwaśniewski, Prime Minister Jerzy Buzek's government became the first administration to be elected under the new constitution. Despite being from opposite parties (Kwaśniewski's center-left Social Democracy of the Republic of Poland and Buzek's center-right Solidarity Electoral Action), the relationship between both offices was smooth, partly due to Kwaśniewski's non-confrontational personality. Kwaśniewski sparingly used his veto powers in legislation the president did not agree with, choosing to let the government's concordant with the Holy See, a new lustration act and new electoral statutes to proceed
Prime minister leader, the incoming leader will usually be referred as "prime minister-in-waiting". An example or this situation was in 2016 in the United Kingdom when Theresa May was elected leader of the Conservative Party while David Cameron was still prime minister. Ukraine's constitution (1996) lists the powers, functions and duties of the Prime Minister of Ukraine. Most prime ministers in parliamentary systems are not appointed for a specific term in office and in effect may remain in power through a number of elections and parliaments. For example, Margaret Thatcher was only ever appointed prime minister on "one" occasion, in 1979. She