Croatia holds parliamentary elections Sunday in which voters will choose between the current center-left coalition government and the nationalist party that led Croatia to independence from Yugoslavia and during the Balkan wars of the 1990s. Opinion polls give almost equal ratings to parties supporting the moderate coalition government, led by the Social Democrat Prime Minister Ivica Racan, and the nationalist opposition group that supports the Croatian Democratic Union, or HDZ, which was once led by late President Franjo Tudjman.