How did the Columbian exchange and triangular trade change the world? (Good and Bad)

Bad

Explanation:

Though there were positive effects, the Colombian Exchange had a long-lasting negative impact. Christopher Columbus's arrival in the Americas facilitated the exchange of plants, animals and diseases between the Old and New Worlds. For generations, Christopher Columbus was considered a hero of American history.

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