senator coburn
U.S. Senator Tom Coburn
US Senator Tom Coburn says the year 2013 may go down as "the worst" for America when "the rule of law gave way to the rule of rulers."

"In both the executive branch and Congress, Americans witnessed an unwinding of the country's founding principles and of their government's most basic responsibilities," Coburn wrote in an op-ed piece for The Wall Street Journal.

"The rule of law gave way to the rule of rulers. And the rule of reality . . . gave way to some politicians' belief that they were entitled to both their own opinions and their own facts," the Oklahoma Republican added.

The senator urged American voters to clean house in the midterm elections, saying "the institutions of government barely function."

"In 2014, here's a message worth considering: If you don't like the rulers you have, you don't have to keep them."

Coburn also criticized President Barack Obama for conforming to the political culture in Washington that he had vowed to reform as a presidential candidate.

He also lamented the botched rollout of Obama's signature healthcare law known as Obamacare.

The Obamacare rollout, controversial revelations of NSA surveillance and stalled efforts on gun control and immigration were among a range of issues which confounded the administration in 2013.

End-of-year opinion polls have indicated that the American people were not satisfied with the White House and Congress last year.