The answer is: Not necessarily. There are probably quite a few leftists who are loyal Americans.
But many do become traitors. Kim Philby, Donald McClean, and Guy Burgess spied for Stalin because they wanted Britain to adopt the same form of government and the same economic system that the Soviet Union had at the time.
Likewise, we learn that Walter and Gwendolyn Myers, recently arrested for spying for Cuba for the past thirty years, were motivated by their admiration for the Cuban government of Fidel and Raul Castro.
"I have become so bitter these past few months. Watching the evening news is a radicalizing experience," he wrote in his diary in 1978, referring to what he described as greedy U.S. oil companies, inadequate health care and "the utter complacency of the oppressed" in America. On a trip to Cuba, federal law enforcement officials said in legal filings, Myers found a new inspiration: the communist revolution.
And likewise the circles in which Myers moved. Even though these are people who are supposed to be advocates for the United States and what it stands for, they end up becoming its worst enemies:
He was a courtly State Department intelligence analyst from a prominent family who loved to sail and peruse the London Review of Books. Occasionally, he would voice frustration with U.S. policies, but to his liberal neighbors in Northwest D.C. it was nothing out of the ordinary. "We were all appalled by the Bush years," one said.
The United States has its problems. It's not perfect nor will it ever be. But we do have open and mostly fair elections. We have an independent congress that are often at odds with the president. We have an independent judiciary who serve as a check on the other two branches of government. We have state and local governments that handle many of the functions.
So how in the world can any sane person prefer a system where virtually all the political power in a country is given to one or two people who were never elected, have ruled the country for 50 years without ever even considering elections, have suppressed all dissent and imprisoned or executed thousands of political opponents?
"Everything I hear about Fidel suggests that he is a brilliant and charismatic leader," Myers wrote, according to the documents.
Many of the people who voted for 0bama have the same mentality.