This model predicts the size of the change of the US debt ceiling in %. It uses Debt Ceiling in $, Debt Ceiling as % of GDP, Year End Debt, President and President's Party as input to predict the % change in the Debt Ceiling.
Source: Guardian Data Blog
I deleted some of the outliers, like president Carters habit to cut the ceiling in half and then doubling it a few months later.
For a different version of this model check here.