They started using billboards i believe hope that helps
<span>Congress has the power to introduce and pass laws. The president has the responsibility of enforcing all federal laws. This is an example of separation of powers. In every democratic form of government, powers are divided to the three branches of government: executive, legislative, and judicial. </span>
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The Monroe Doctrine is the best known U.S. policy toward the Western Hemisphere. Buried in a routine annual message delivered to Congress by President James Monroe in December 1823, the doctrine warns European nations that the United States would not tolerate further colonization or puppet monarchs.