The Reluctant President by Jack R. Stanley

What if in the dark, small hours of a morning you discovered Secret Service agents at your front door telling you that you were now the President of the United States? That’s the way it happened to Porter Randall, a Texas Panhandle surgeon turned novelist who had been persuaded by friends to run for Congress for just a couple of terms. Could a non-politician without rampant ambition or a lust for power fulfill this office? What would happen to the country? Would he, could he make a real difference in the world of Washington, D.C. politics and the world? Porter Randall becomes The Reluctant President and finds out.