Jaroslaw Kaczynski has announced plans to run for President in Poland’s upcoming election.
The vote in June has had to be called following the death of his twin brother Lech Kaczynski in a plane crash earlier this month.
The tragedy, in which 96 were killed, delivered a body blow to Poland’s political elite and plunged the country into a week of deep mourning.
It culminated in a state funeral for Lech Kaczynski and his wife, following which they were interred among Poland’s historical elite in Wawel Cathedral in Cracow.
Despite an upsurge of sympathy for the Kaczynski family, opinion polls still show acting President Bronislaw Komorovski, the candidate of Poland’s governing Civic Platform, as the most likely winner.
Jaroslaw Kacznski, who is also a former Prime Minister of Poland, will stand for his centre-right opposition Law and Justice party.
The crash happened when the polish government plane came down just before landing in Smolensk in Western Russia.
The political and military delegation it was carrying was on its way to a memorial service for the Second World War Katyn massacre.
Before the crash, polls rated Jaroslaw Kaczynski as the most distrusted politician in Poland. His centre-right party backs populist economic policies and favours a tough line towards Russia and the EU.