political decision
Refers to a decision made by a political leader, government, or party, often implying a significant or difficult choice.
The prime minister made the political decision to raise taxes.
That policy requires a difficult political decision.
決断 is a general 'decision' or 'resolution', while 政治決断 specifically refers to a decision in the political sphere.
Compound of 政治 (politics) and 決断 (decision).