Is there ELI5 for us Europeans?
Members of parliament are vacating their seat because they are not satisfied with what their party is doing? That would be seen as rather undemocratic over here. You would expect them to leave the party, maybe join a different one, or stay as an unaffilated member.
What will happen with the empty seats?
„Torpfostenbewegungskrieg“ would be correct. I‘d prefer „Torpfostverschiebekrieg“ though.