After elections, it is customary for the President to ask the leader of the strongest party to become chancellor and form a cabinet. Since this party leader, for all intents and purposes, needs a majority in the National Council, he will usually seek to form a coalition with another political party or parties. The coalition then agrees on a list of ministers, customarily including the coalition parties' leaders. Obviously, if a party holds a majority in the National Council all by itself, no such coalition is needed. This has happened in the past, but, owing to the growing number of political parties in Austria and the system of proportional representation will not likely again any time soon.