* Former Prime Minister Babis aims to return to power * Babis may need fringe allies to form majority * Babis opposes EU's climate, migration policies * Babis would scale back Czech support for Ukraine * Voting ends at 2 p.m. (1200 GMT) (Adds voter in paragraphs 14-15) By Radovan Stoklasa and Jan Lopatka PRAGUE, Oct 4 (Reuters) – Czechs voted on Saturday in the final day of an election likely to return populist billionaire Andrej Babis to power on pledges to raise wages and lift growth, while reducing aid for Ukraine. The change from the current centre-right cabinet would boost Europe's populist, anti-immigration camp and could harden opposition to the European Union's climate goals. Czechs endured surges in inflation after the global pandemic and Russia's 2022 invasion of Ukraine, and hav

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