>> Donald Trump leaping head long into another minefield Wednesday, as he seemed to invite Russia to engage in espionage against the US to find emails deleted by his 2016 rival, Hillary Clinton.>> I will tell you this, Russia, if you're listening, I hope you're able to find the 30,000 emails that are missing.
>> Trump's comments, even if in jest, extraordinary coming from a presidential candidate, giving Democrats and other critics fresh material to question his fitness for the Oval Office. Emily Stephenson follows the Trump campaign.>> Democrats are not taking this as a joke.>> They are treating it as Trump inviting espionage against one of his political opponents.
So, just in general, you're seeing this behavior that is not typical and not considered appropriate of a major party presidential nominees. And you have seen some people with national security experience said that, at the point where major party presidential nominee is inviting espionage, it becomes a national security issue.
>> Former Defense Secretary Leon Panetta quickly blasting Trump's comments as beyond the pale. And House Speaker Paul Ryan distancing himself, his spokesman branding Putin a devious thug who should stay out of the US elections. The comments coming as Trump hit back against allegations Russia was behind the release of thousands of embarrassing Democratic Party emails on WikiLeaks.
>> We have nothing to do with Putin, I've never spoken to him, I don't know anything about him. And if it is Russia, which it's probably not, nobody knows who it is. But if it is Russia, it's really bad for a different reason, because it shows how little respect they have for our country.
>> The timing just ahead of the Democratic National Convention raising questions whether the Kremlin was trying to hurt Clinton's campaign and help Trump, who has praised Putin in the past.>> I'm not gonna tell Putin what to do. Why should I tell Putin what to do?>> Russia denying any involvement in the hack on Wednesday saying, the US seems to believe horror stories it created itself.