Mr Kaminski was first elected to the European Parliament for the Law and Justice party in 2004 where he became a member of the Internal Market committee and vice chair of the group Union for a Europe of Nations.
Pirmoreiz Eiropas Parlamentā M. Kaminski ievēlēja 2004. gadā; viņš kļuva par Nāciju Eiropas grupas priekšsēdētāja vietnieku.