ANKARA (Reuters) – Turkish President Tayyip Erdogan on Thursday signed off on the parliament’s ratification of Sweden’s NATO membership bid, the presidency’s official gazette showed, marking the final step in Ankara’s approval of Stockholm into the alliance. Parliament ratified Sweden’s NATO bid on Tuesday, clearing a major hurdle to expanding the Western military alliance after 20 months of delay. Hungary remains the only ally yet to ratify the Nordic nation’s accession into the alliance. (Reporting by Tuvan Gumrukcu and Ezgi Erkoyun; Editing by Chris Reese)