It's pretty universally agreed among serious political scientists (liberal and conservative), historians and the like that two of the things that serve to make any nation-state "great" are: (1) the unity of its people, and (2) the beneficial and cooperative role that it plays in the community of nations around the world.
Right now, the United States is more divided internally than at any time since the Civil War, and it has alienated itself from virtually the entire community of nations by the mistaken belief that bullying is strength and blackmail is leadership.
The United States was never a "great" nation per se (i.e., brute force power is not the same as greatness). It was built on the genocide of its native inhabitants, African slavery to produce economic advantage, and systematic exploitation of weaker nations through economic, military, and political strong-arming.
The idea that this latest decent into much more acute internal divisiveness and extreme external bullying is designed to improve the "greatness" of the United States is utterly ludicrous.
I live abroad and traveled a lot all over the world. Never, in nearly a half century of global travel, have I found that foreigners think less of America than they do now. America's international image is in the pits.
The other big potential measure of "greatness" might be economic prosperity, but Americans of all political stripes (e.g., conservative and liberal) are suffering from the most grotesque inequality in the distribution of wealth in America since the Roaring 20s, and this socioeconomic crisis has only grown worse in the past two years.
Thus it is my observation and personal opinion that "MAGA" or "Make America Great Again" is simply another political slogan along the lines of "Change we can believe in"; sounds good to the voters, but it means absolutely nothing in reality.
JAH IS THE SOLUTION