Former Mexican President Vicente Fox mocks Trump: 'Tell me, what does losing feel like?

Former Mexican President Vicente Fox took to Twitter Tuesday to mock Republican nominee Donald Trump for his Monday night debate performance.

Fox posted to Twitter that Trump looked "afoul" during the debate, while his Democratic challenger, Hillary Clinton, looked "very, very presidential."

Later, Fox posted to Twitter a screenshot of a recent fundraising email sent out by the Trump campaign. According to Fox, it proved Trump was "begging" for his help.

"@realDonaldTrump you have no shame, I just got another e-mail begging for help," Fox wrote. "Tell me what does losing feels like? Have a little dignity!"

Neither Trump nor Fox is fond of the other, having had their fair share of run-ins in the past.

But Fox didn't keep his post-debate commentary confined to Twitter. He told the Washington Post Tuesday that Trump is "a danger" and "a threat to the world." He even labeled the billionaire businessman the "imperialistic gringo."