Prince Carl impressed the delegation in many ways, not the least because of his sensitivity to the liberal and democratic movements that had led to Norway's independence. Though the Norwegian constitution stipulated that the Storting could choose a new king if the throne were vacant, Carl was aware that many Norwegians — including leading politicians and high-ranking military officers — favored a republican form of government. Attempts to persuade the prince to accept the throne on the basis of election at Parliament failed; Carl insisted that he would accept the crown only if the Norwegian people expressed their will for monarchy by referendum and if the parliament then elected him king.