Partisanship is marked by the tendency to take a side and inability to take a balanced view on an issue
It is marked by the tendency to take a side.

Division

A person who is strongly committed to a party, group or faction is known as partisan. Partisanship is marked by a tendency to take a side and inability to take a balanced view on an issue.
what is partisan
partisan
what is partishanship
Partisanship a term used when a politican steadfastly supports the official party line and refuses to engage with the opposition party of his parent outfit.