Mr. Levy says "Moses wrote the Ten Commandments". In fact according to the bible Moses brought down the Ten Commandments that had been written in stone by God.
During the period of the film set in 1907, Yancey is the Progressive Party's candidate for governor of Oklahoma. The Progressive Party did not form until 1912, and then disbanded after Theodore Roosevelt's unsuccessful third party candidacy that year.
At about the 0:33 minute mark boom mic shadows can be seen on the wall above actor Roscoe Ates ("Jesse Rickey").