The true statement about political parties is:
The U.S. Constitution does not mention political parties.
The other statements contain inaccuracies. For example, George Washington did not create any political party; he is known for warning against the divisive nature of political parties in his farewell address. It is not illegal for one party to control both houses of Congress; this can and does happen depending on election outcomes. The Democratic Party was not the dominant party between 1860 and 1932, as the Republican Party also held significant power during that period.