Impeachment itself will take the two years he has left to even get moving, there are far too many stall tactics they could easily use to slow it way down...and they would do so. Meanwhile Obama will continue forward.
However...it’s been said hit a man in his purse if you want to cripple him....and so they could stop his funding for whatever he wants to do. Will they is the question...they could have done so with Obama care and they didn’t.
YOU CAN’T DEFUND AMNESTY....