By bne IntelliNews Croatia’s general election on April 17 will pit the ruling conservative Croatian Democratic Union (HDZ) against its main rival the opposition Social Democratic Party (SDP). The impending showdown between the rival parties follows months of sniping Prime Minister Andrej Plenkovic of the HZD and President Zoran Milanovic, who sought to be the SDP’s candidate for prime minister but was blocked by the Constitutional Court. A victory for the HDZ — indicated as likely in recent polls — represents continuity for Croatia. Milanovic and other SDP politicians, meanwhile, say they plan…