An example of a government power shared by the national ans state governments is the power to?

Powers that are shared by national and state governments are the "concurrent powers", which might be exercized by both authorities at the same time. Examples are the creation and collection of  taxes , establishment of courts and elections regulations.  

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

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