Imho going back before Reagan isn't really relevant. In the modern era we have Reagan (8), Bush I (4 because he raised taxes), Clinton (8), Bush II (8), Obama (

Imho going back before Reagan isn't really relevant. In the modern era we have Reagan (8), Bush I (4 because he raised taxes), Clinton (8), Bush II (8), Obama (8), Trump (4 because he botched covid), Biden (4). Biden would probably have been re-elected were it not for the cognitive decline, so he didn't exactly do anything wrong enough to be a single-term president.