Complex sentence: Jackson then took his struggle for vindication to Congress, where, although he convinced the House that Wayne had not won fairly, he failed to regain his seat after the tie-breaking vote of the Federalist Speaker.
Split into simpler sentences: Jackson then took his struggle for vindication to Congress, where, but he convinced the House that Wayne had not won fairly. He failed to regain his seat after the tie-breaking vote of the Federalist Speaker.