Donald Trump said in a speech today that he spent 55 million dollars of his own money so far. It was reported earlier this week that his campaign has three million dollars.

In 2012, both Obama and Romney raised and spent over one billion dollars each. That's quite a difference from three million to one billion.

It has also been reported that the big donors are reluctant to contribute to Trump's election, and the RNC is almost broke. So where is the money coming from?

First and foremost, Trump is a businessman. It doesn't seem likely that he will continue spending his own money when everything looks hopeless.

It was also reported today that the Koch brothers will not contribute to the republican national convention, and a lot of the big donors are also backing out.

Follow the money to see how long Trump stays in the race.