Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) The leadership of the AFL-CIO voted on Thursday to endorse Hillary Clinton for president, according to a spokesman for the union federation. "Hillary Clinton is a proven leader who shares our values," AFL-CIO President Richard Trumka said in a statement after the vote. "Throughout the campaign, she has demonstrated a strong commitment to the issues that matter to working people, and our members have taken notice. The activism of working people has already been a major force in this election and is now poised to elect Hillary Clinton and move America forward." The endorsement from the more than 12 million member organization is a boon for Clinton, who after clinching the Democratic nomination for president will face Republican presumptive nominee Donald Trump in November.The union has 12 million membersIt endorsed Clinton on Thursday 
 Question:Last week, the _-CIO's political committee voted to back Clinton in the general presidential election, a move that all but locked up the endorsement for the former secretary of state.

AFL