Reality is that it is irrelevant if Obama knew or not. If his administration did this then he has their leader holds the final responsibility for their actions. Clearly it seems that the FISA court was asked for a warrant and supposedly refused one early in 2016 then granted one in October. This warrant produced no criminal conduct and thus by not finding it proved that the assertions under which it were made were false. So that means the Obama administration went on a fishing trip just before the election and clearly that is incredibly unnerving and wrong.