Agroup of people united to promote a cause is called a

Caucus is the right answer.

The term caucus in traditional terminology means a meeting of the particular party constituents in a local area, for the intention of nominating applicants for office or for electing representatives to country or state party committees. The caucus is the earliest system of electing representatives in the U.S., widely recognized as beginning in the English colonies prior to the American Revolution.

it the big letter b heart my answer

lincoln won 212 electoral votes to mcclellan's 21 votes, and lincoln beat mcclellan. is the main reason lincoln won in 1864.