Tomasz Naà ÂÃÂcz (born 29 October 1949 in Goà Âymin) is a Polish historian, leftist politician, former vice-Speaker of the Sejm, a former member of the Social Democracy of Poland party (SdPl) In the past he used to be member of the communist Polish United Workers' Party (PZPR) (1970–1990) and later its social-democratic successor, Social Democracy of the Republic of Poland. In the years 1993-2004 he was a prominent member of Labour Union. He left the Labour Union after SdPl was founded by Marek Borowski.
In 2003–2004 Naà ÂÃÂcz was also the chairman of the Sejm's special parliamentary inquiring committee which tried to unravel the Lew Rywin affair.
In December 2009 Naà ÂÃÂcz was selected as the SdPl's candidate for the election due to take place in autumn 2010. However, following the Smolensk plane crash which killed incumbent president Lech Kaczyà Âski and brought forward the election to June, Naà ÂÃÂcz withdrew from the contest.