True, Andrew Jackson was the most openly partisan and politically involved president in history up to that point.
A partisan is an ardent supporter of a political party or army. In multi-party systems, the term refers to people who strongly support the policies of their party and are unwilling to compromise with political opponents. A political partisan is not the same as a military partisan.
This is similar to agenda bias in that it exists primarily when the emphasis is on politicians and how they choose to cover and present preferred policy discussions and issues.
