Doom absolutely owns Lex. Does anyone here really think that if Doom wanted to that he could not discover that Superman is really Clark Kent. Actually I beleive he already did once. Knowing that kryptonite is Supermans weakness that he would not be able to kill Clark.
Lex winning the presidency was able to happen in DC, because DC is not in the "real world" like Marvel.
You think Wilson Fisk, Norman Osburne or for that matterTony Stark could not become President if Marvel wanted him to.