Both Obama and Trump can be known as the greatest, but great is defined by totally different classes of people.I find it difficult to disagre, but let's be caution.
None in America come even close to greatness due to elevating hundreds of millions of his people up out of poverty.
Socialism and Communism can't be held back and destroyed in any countries that are large and powerful enough to resist socially irresponsible capitalism.
And now, in this 21st. century, even small victim countries are beinig able to bread free of America' military influence with the aid of equally powerful large countries.
Even America's evil proxy, the Zionist regime, has been stopped dead in their tracks by Iran!