Smartly, the US wants to get rid of costly $1 notes that wear out fast, and replace them with coins -- like the Sacagawea dollar -- that last for decades. Not-so-smartly, the government lacked the political will to do as Canada did, namely, just get rid of the note! Do that, and people will use the coin.
All coin images in Daniel's Coin Zoo are from my personal collection. I collect, research, and personally photograph every coin displayed on this site. PLEASE do not take my images without permission. If you would like to use any coin image you see, just ask me. Thank you.