I found that Lincoln was a Democrat in my History book. Is it true?

nope he is a republican I don't know why he is a democrat

Explanation:

He was actually the first republican president :/

The party he participated to found was called "National Union party" in other words the republican party.

answer; i believe the above statement is (true);

- "bill clinton ( the 42nd u.s. president, served in office from by low unemployment, declining crime rates and a budget surplus. during clinton's second term, the u.s. economy was healthy, unemployment was low and the nation experienced a major technology boom and the rise of the internet."