The President of the United States of America, Barack Hussein Obama, has generated so much fear that the most common theme of posted comments and private communications is that he will refuse to relinquish power if defeated in November or that, under some pretext, he will declare a state of martial law.
Many, myself included, did not like the Patriot Act that was enacted following 9/11 but there is little evidence that this law has been abused to deprive Americans of their fundamental rights and freedom, though surely some suspected of being terrorists were detained.
