A major result of the Emancipation Proclamation was that O it brought an end to the war.

it made the Union weaker.

O it provided the Union with a larger army.

o it brought border states into the fight.

ummm? is that supposed to be a question or a but this is a reason he won re-election

explanation:

"despite progress in the war, lincoln and most political pundits were convinced that he would lose his bid for reelection in 1864. the country was war weary and the democratic party's nominee, george mcclellan, was likely to negotiate a peace treaty with the confederacy if elected." - loc.gov