To expand his power, Napoleon used these assassination plots to justify the creation of an imperial system based on the Roman model. He believed that a Bourbon restoration would be more difficult if his family's succession was entrenched in the constitution. Launching yet another referendum, Napoleon was elected as Emperor of the French by a tally exceeding 99%. As with the Life Consulate two years earlier, this referendum produced heavy participation, bringing out almost 3.6 million voters to the polls.