sam1, obsttucting impeachment is a crime. The Constitution Article II Section 2 gives the sole power of impeachment to Congress and if they can’t investigate, they can’t impeach. So if there is a suspicion of wrong doing, the president must cooperate as SCOTUS ruling by Nixon with the tapes. He can stop funding for corruption, if the US has a benefit in it, but not for his self interest to undermine his opponent. He provided aid previously when there was more corruption, so the question is what made him stop?
