STOP Vladimir Putin from coming to the USA

Hello:
After the disaster in Helsinki and given the fact that NOBODY except the President and Putin really know what happened, there is NO reason that this murdering dictator should set foot in our country. He is NOT a friend or ally to the United States and NEVER will be. In fact, he would like nothing better than to see the destruction of our democracy and our way of life. Therefore, I believe that we should stop him from coming to America as the majority of Americans DO NOT want Putin in our country.
Thank you