What type of column do the white house column most closely resembles

Hey there!
The White House, along with most other government buildings have their architecture based off of that of the Ancient Greeks.
The ancient Greeks used 3 main types of columns, Doric, Ionic, and Corinthian.
The White House features Ionic columns, more detailed than the plain Doric, however less detailed than the intricately carved and immensely detailed Corinthian columns.
Hope this helps!