Donald Trump Calls on Russia to Find Hillary Clinton’s Missing Emails - The New York Times

Also see 'Treason'? Critics savage Trump over Russia hack comments (Politico)

"“Russia, if you’re listening, I hope you’re able to find the 30,000 emails that are missing,” Mr. Trump said, staring directly into the cameras during a news conference. “I think you will probably be rewarded mightily by our press.”

Mr. Trump’s call was an extraordinary moment at a time when Russia is being accused of meddling in the United States’ presidential election. His comments came amid questions about the hacking of the Democratic National Committee’s computer servers, which American intelligence agencies have told the White House they have “high confidence” was the work of the Russian government."

On a related note, from Why Trump Really Doesn't Want to Release Those Returns (The Atlantic):

"And if Russia really wanted to prove that they are not partial to Trump, and if his returns were filed by his team or are kept by the IRS in electronic form, then the Russians could release his returns for him.  Somehow I doubt that will happen."

Donald Trump Calls on Russia to Find Hillary Clinton’s Missing Emails - The New York Times