When was obama elected as president and when was he no longer the president?

January 20, 2009 to January 20, 2017.

He ran 2 terms, each term being 4 years. He was a democrat.

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.