Life after Tusk?

Numerous sources report increasing popularity of Polish Prime Minister Donald Tusk as the new EU Council head.  Since David Cameron's recommendation, influential figuers express support for this candidature. Prime Minister has initially aproved his potential future post, but how is that decision going to influence Polish politics? "When one enters politics, any post that helps Poland is possible. If the situation requires it, I would be able to become the next Prime Minister" states Ewa Kopacz,  the Marshall of Parliament.  Kopacz arouses controversial opinions, especially concerning her work as the Ministry of Health. Even though Reuters reports Tusk as the most probable candidate for the position, much is still unknown about the leadership of Polish government and its leading party PO.