KYIV, Ukraine — The seven-foot-tall bronze statue of Ronald Reagan bursting through the Berlin Wall was supposed to be here by now, standing in one of the Ukrainian capital’s prominent public squares. The monument was the brainchild of Maryan Zablotskyy, who grew up venerating Reagan in Lviv in western Ukraine — as many did in the post-Soviet years. Zablotskyy founded the Ayn Rand Center Ukraine to promote the libertarian author and covered his office walls with posters of Reagan, Margaret Thatcher and Winston Churchill, with their quotes translated into Ukrainian. Now a member of his country’s parliament, Zablotskyy, 37, faces...