Stanislaw Tyminski, the Polish-born Canadian businessman who challenged Lech Walesa in the recent presidential election, arrived from Toronto Friday to stand trial for allegedly insulting former Prime Minister Tadeusz Mazowiecki.

A group of 50 Tyminski supporters and his Peruvian wife Graziella greeted him at Warsaw's Okecie airport chanting, "Long live our president."Tyminski, who unexpectedly outpolled Mazowiecki in the Nov. 25 election before losing to Walesa in a Dec. 9 runoff, was charged under an old Stalinist penal code with insulting a public official.