ic ▁and ▁popul ists ▁sent iments , ▁although ▁differ ing ▁on ▁economic ▁policy . ▁ ▁The ▁election ▁campaign , ▁in ▁which ▁both ▁centre - right ▁parties ▁competed ▁mainly ▁against ▁each ▁other ▁rather ▁than ▁parties ▁on ▁the ▁left , ▁acc ent u ated ▁differences ▁and ▁created ▁an ▁ant agon istic ▁relationship ▁between ▁the ▁two ▁parties . ▁ ▁The ▁minor ity ▁government ▁dep ended ▁on ▁the ▁support ▁of ▁the ▁radical ▁Sam o ob ron a ▁and ▁the ▁deeply ▁conserv ative ▁League ▁of ▁Polish ▁Famil ies ▁( L PR ) ▁to ▁govern , ▁a ▁situation ▁that ▁made ▁many ▁of ▁those ▁hoping ▁for ▁a ▁Pi S / PO ▁coal ition ▁une asy . ▁On ▁ 5 ▁May ▁ 2 0 0 6 ▁Pi S ▁formed ▁a ▁coal ition ▁government ▁with ▁Sam o ob ron a ▁and ▁L PR . ▁ ▁In ▁July ▁ 2 0 0 6 , ▁Marc ink iew icz ▁tender ed ▁his ▁res ignation , ▁following ▁reports ▁of ▁a ▁r ift ▁with ▁Pi S ▁party ▁leader ▁K ac zy ński . ▁ ▁K ac zy ński ▁formed ▁a ▁new ▁government ▁and ▁was ▁sw orn - in ▁on ▁July ▁ 1 4 , ▁finally ▁becoming ▁prime ▁minister . ▁ ▁The ▁S LD ' s ▁severe ▁defeat ▁sent ▁the ▁party ▁into ▁a ▁sharp ▁decl ine ▁from ▁which ▁it ▁has ▁never ▁recovered ; ▁it ▁ultimately ▁lost ▁all ▁of ▁its ▁remaining ▁seats ▁in ▁ 2 0 1 5 ▁though ▁it ▁reg ained ▁some ▁ground ▁in ▁ 2 0 1 9 . ▁ ▁Further ▁reading ▁ ▁References ▁ ▁External