Final answer:
James Edward Ferguson was the only Texas governor to be impeached, which occurred in 1917 over accusations of financial misconduct.
Step-by-step explanation:
The only Texas governor ever to be impeached was James Edward Ferguson. In 1917, Ferguson was impeached during his second term due to accusations of misuse of public funds and other charges. After the impeachment, Ferguson was subsequently banned from holding office in Texas.
The impeached governor's wife, Miriam A. Ferguson, later ran for the office and served as Texas' first female governor, carrying on the Ferguson name in the state's executive leadership. Despite this political setback, the Ferguson family remained influential figures within Texas politics.
Hence, James Edward Ferguson was the only Texas governor to be impeached, which occurred in 1917 over accusations of financial misconduct.