Donald Trump’s campaign manager is out. Here are the brutal numbers that tell us why.

Supporters of Donald Trump got an unexpected plea on Saturday: a request to send the billionaire money.

It was an “emergency” request, the Hill reported, representing an urgent need for an infusion of $100,000 to put ads on the air in battleground states. Why Trump couldn’t simply write a check to cover the costs apparently wasn’t explained, but the missive was useful regardless: It demonstrates clearly the difficult position of the Trump campaign with only 142 days to go.