That's a great question.

Here is the monthly chart and the odds: Election Betting Odds by Maxim Lott
It looks like if someone would have jumped in early on Trump to win the nomination they would have made a killing.

Here is the chart for the presidential prediction.
Election Betting Odds by Maxim Lott

The last time I posted a link to a numbered chart about the debt no one would follow the link and just ask "Where's your numbers?."