Poland Looks Back in Anger

Poland's combative Kaczynski twins are not shy about picking a fight. The President, Lech, and his brother, Jaroslaw, the Prime Minister, have squared off with the country's central bankers, as well as its foreign-policy élite. But a new bill passed by the Polish Sejm in late July may be their most contentious move yet.

The law fulfills the former dissidents' campaign promise to root out anyone associated with the old communist regime, but goes much further than most Poles expected. Previously, only someone who wanted to serve in public office was required to...