KEYSTONE, South Dakota - U.S. President Donald Trump called on Americans to protect the freedoms the nation’s founders envisioned 250 years ago against what he has portrayed as the “communist” threat posed by progressive Democrats, speaking on the eve of Independence Day at Mount Rushmore.“We stand beneath ​the monument of these heroes, a true group of unbelievable people, and we rededicate ourselves ‌to being ‌a nation as big, bold, noble, and as great as these American giants, ​and that’s not easy to do, but we’re going to do it,” Trump said at the granite mountain in South Dakota where the heads of four American presidents are carved.“There is now ⁠a resurgence of the communist menace in our land, including from newcomers to our country who embrace ideas totally opposed ⁠to our way of life and our great success,” he said. “We’re not going to let this happen.”