Bump for later listen. Arguably it is worse than you posit.
Let's assume the conventional view that legal immigrants have little interest in an open borders immigration policy and therefore that O is not talking to them.
If that is valid then it appears at first glance he is encouraging illegals to corrupt our nation's political system by defrauding its election process.
Does such a covert act constitute an impeachable offense?
Almost certainly, under normal circumstances.
covert = overt
the c is because of the coffee I have not had.