One's principles and the positions one asserts — doctrines or stances that a person or group advocates.
彼は明確な主義主張を持っている政治家だ。
He is a politician with clear principles and positions.
討論会では各候補が主義主張を述べた。
At the debate, each candidate stated their principles and positions.
主義主張が対立して話し合いが難航した。
Differing principles and positions caused the talks to stall.