Complex sentence: Hardman was later expelled in 1923 from the Worker's Party for refusing intervene on behalf of the WP at the Conference of Progressive Political Action in Cleveland 1922 and for refusing to submit his magazine, the "American Labor Monthly," to party control.
Split into simpler sentences: Hardman was later expelled in 1923 from the Worker's Party on two charges. The other charge was for refusing to submit his magazine, the "American Labor Monthly" to party control.