What is the gain if the US dollars is backed by Bitcoin? Is this even a possibility? This came from Kennedy and also Trump claimed that he will make sure that Central bank digital currency won't become a thing.
What is the advantages and the disadvantages you see here? Ate these people just saying anything that they can think of? Or this is possible? The biggest liars of the century are from the politicians around the world , once they get elected they do something else.
Will Bitcoin become better if any of these become possible?
I am not sure what you are getting at here or how you formed this idea, but US dollars will never be backed by Bitcoin.
Remember that USD is the world reserve currency, and many countries outside of the USA use USD to transact.
The total supply of USD is $25 trillion. Let's round it down to $21 trillion to make math easier. That would make, with a supply of 21 million BTC, that each coin is worth 1 million coin each. That is, taking into account the US government would need to buy EVERY single coin. So in demand alone, the price of 1 btc would be way more than 1 million.