Radosław Sikorski is the head of the Ministry of abroad Affairs, now he wants to become president. Who is he?

Radosław Sikorski is the Minister of abroad Affairs in Donald Tusk's government. He held this position in 2007-2014. Now he would like to run for the president of Poland. The primaries, in which he will face Rafał Trzaskowski, will decide whether he will become the candidate of the Civic Coalition. What is worth knowing about Radosław Sikorski?