Lenin would be on the top left corner of the grid.
Lenin would be way over to the left, and probably above the horizontal line, but not right up at the top. Stalin, on the other hand, would definitely be in the very top left.
However, with many extreme political positions, the distinction between "right" and "left" often ceases to make sense! If the USSR
had been ruled by a far-right party, somebody at the top could have behaved almost exactly like Stalin and still fitted in.
Of course, this is irrelevant to US politics, except to those who want to make extreme comparisons.