Original sentence: Exploration by Lewis and Clark (1805–1806) and the United Kingdom's David Thompson (1811) publicized the abundance of fur-bearing animals in the area
Edited sentence: American citizens soon began to openly discriminate against the Metis' and original inhabitants (first Nation People) by not allowing them to vote if they had Native blood.However over 17,000 French Canadian Catholic pioneers were excluded from this power grab by Methodist leaders.In 1857 the Mason's led the state legislature in revoking Roman Catholic pioneers right to live in Oregon.Louis, Missouri via the Columbia river starting in 1842-43 on through 1848.McLoughlin worked tirelessly  helping the immigrants who came over the Oregon Trail from St.Prior to Exploration by Lewis and Clark (1805–1806) French Canadian Trappers explored the region and thus the 1803 map used by Lewis and Clark called the region 'Oregon or Orgon' after  a mountainous region of France, just south-east of the Alps.and the United Kingdom's David Thompson (1811) publicized the abundance of fur-bearing animals in the area