With congress, the Senate and House of Representatives. The Senate ensured that no matter how big or small the state was they would receive 2 senators for each state,this pleased the small states, or the New Jersey plan. The House of Reps was made to satisfy the larger states or the Virginia plan where the number of Representatives would come from the population of the state.
The information found by Lewis and Clark showed many new places to settle, what the new land was like, and what could be accomplished in those areas. They found more land to farm and build homes. They also found some of the major rivers and landmarks of today.
It would be John C Fremont. However he didn't win the whole election, the Democrat he was running against did.
" It carried the natural resources of the West-minerals, timber, crops, and cattle-to eastern markets. In turn, trains brought miners, ranchers, and farmers west to develop these resources further. "
Source : jiskha.com
Hope this helps