I've read a number of articles suggesting that the USA has a Mars colony, including (if I recall correctly, but I can't find the link now) one where an official in China stated that they believed the USA had a secret military base on Mars, and another that indicates that the USA attempted to recruit the great-granddaughter of President Eisenhower for a Mars colony project. While the latter seems to likely be malarkey, it seems to be one of the more common references to a USA Mars colony project. I'm curious about whether anyone's put any serious thought whether the USA could secretly create a Mars colony.
Is there any evidence that the USA either has or plans a secret colony on Mars?
Is it logistically possible that the USA could start a Mars colony and keep it secret?
Edit 2020
It's worth noting the newsworthy claims of Haim Eshed, noted in numerous news articles including NBC's "Former Israeli space security chief says extraterrestrials exist, and Trump knows about it" :
A former Israeli space security chief has sent eyebrows shooting heavenward by saying that earthlings have been in contact with extraterrestrials from a "galactic federation."
"The Unidentified Flying Objects have asked not to publish that they are here, humanity is not ready yet," Haim Eshed, former head of Israel's Defense Ministry's space directorate, told Israel's Yediot Aharonot newspaper.
Eshed said cooperation agreements had been signed between species, including an "underground base in the depths of Mars" where there are American astronauts and alien representatives.