Polish Prime Minister Donald Tusk appealed to President Lech Kaczyński for disclosing all the information that could discredit the Foreign Minister Radosław Sikorski as the ruling party PO's presidential candidate, Rzeczpospolita writes.

The daily is referring to a letter Tusk sent to the president.
Tusk's move follows the allegations by the main opposition party PiS head Jarosław Kaczyński that the President had known some unfavorable facts about Sikorski and hesitated to nominate him as the Foreign Affairs Minister back in 2007.