U.S. President Donald Trump is insisting he has evidence that China is attempting to meddle in the U.S. midterm elections. At a news conference Wednesday in New York, a reporter asked Trump what evidence he has to back up the accusation, which China has denied. He said he can't disclose what evidence he has, but that it will come out. He says his allegation did not come "out of nowhere." The Trump administration said China is stepping up covert and overt activities to stifle free speech, punish those who support the president's tough trade stance against China and interfere in the U.S. political system.