Who started the Lewis and Clark journey?

Answer 1

Thomas Jefferson had dreamed of exploring the West for at least 20 years before he even became President. In 1783 he had even asked William Clark's brother, George, to take on the challenge. The Louisiana Purchase would later alter the character of the planned expedition from an exploration of French territory to a first glimpse of lands that, in the view of many contemporaries, were essential to maintaining the agrarian, republican character of the nation.

After finally purchasing the Louisiana Territory, and two weeks before inauguration day Jefferson asked Lewis, in January of 1803, to go on the journey. Jefferson then requested $2500 from Congress to pay for the costs of the trip.