As governor, Johnston successfully proposed the establishment of a crippled children's hospital and a large increase to school aid funds.

After a few years in Colorado, Johnston would move to Perry in Oklahoma Territory where he would become a powerful and popular figure throughout the area of Noble County.

These men would work together to write one of the most progressive Constitutions of any U.S. state, as well as the longest governing document in the world at the time.

On January 10, 1927, Johnston was inaugurated as the seventh Governor of Oklahoma with all the hopes of a successful administration.

Immediately, the Oklahoma Legislature approved Johnston's appropriation proposals to establish a crippled children's hospital and increased school aid funds to over $1,500,000 a year.

Believing that Johnston was neglecting his duties, the leaders of the state legislature's demanded that she be immediately discharged from the governor's services.

Determined to impeach Johnston for neglect of his duties by the end of 1927, the legislative leaders met in special session under a newly adopted initiative proposition.

When the state legislature met in regular session in 1929, both Democrats and Republicans crafted a second wave of impeachment charges.

Of the thirteen charges presented by the Oklahoma House of Representatives, the state senate accepted eleven.

The trial came to an end on March 20 with the State Senate removing Johnston from office on the eleventh charge: general incompetence.

After leaving the Senate, he would once again return to practice law in Perry, where he died at the age of 97 on January 7, 1965.

The removal of Johnston proved to be the Oklahoma Legislature's apex of dominance against the other two branches of state government.

Only Governors Charles N. Haskell and Robert L. Williams would wield great executive power during this time.