WEST PALM BEACH, Fla. (AP) - President-elect Donald Trump says it's "sad" that Hillary Clinton is joining an effort to force vote recounts in up to three states.
    
Trump tweeted part of Clinton's concession speech, when she told supporters they must accept that "Donald Trump is going to be our president." He also tweeted snippets from her debate remarks when she assailed Trump for refusing to say in advance that he would accept the Election Day verdict.
    
During his campaign, Trump repeatedly questioned the integrity of the U.S. election system.
    
Green Party presidential nominee Jill Stein is pushing for recounts in three key states, Wisconsin, Pennsylvania and Michigan.
    
Trump won Wisconsin and Pennsylvania, and as of Wednesday, held a lead of almost 11,000 votes in Michigan, with the results awaiting state certification Monday.
    
On Friday, Wisconsin officials said they were moving forward with the first presidential recount in state history. Clinton joined the effort Saturday. Her campaign attorney said she was taking the step "in order to ensure the process proceeds in a manner that is fair to all sides."