Why does the house have the power to elect a president if no candidate receives a majority of electoral votes

A presidential contingent election is decided by a vote of the United States House of Representatives, while a vice-presidential contingent election is decided by a vote of the United States Senate. ... Senators, on the other hand, cast votes individually for vice president.

Explanation:

im sorry i dont know a lot of this but ill try my best

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the united states has a federal government. the president is the head of the federal government of the united states. however, each state forms its government for administration purposes. the powers of the state governments are exercised within restricted state boundaries. and citizens participate in this government by voting.