Complex sentence: The then governing parties got a razor thin majority, 32 members of the Parliament against the opposition's 31, due to considerable losses for the Progressive Party, which had the worst election in its more than 90-year history.
Split into simpler sentences: The then governing parties won a razor-thin majority, 32 seats against the opposition's 31. This was caused by considerable losses for the Progressive Party, which had the worst election in its more than 90-year history.