I heard something yesterday that kinda puts all this in perspective, and seems to make sense...
theory is that Trump and his closest advisers are counting on the DOJ mandate/opinion that a sitting President can not be indicted for a crime. So they have concluded that there is no real criminal threat to Trump...the only real threat is political - impeachment. In the political world, Trump's lies and obstruction has not caused him any harm, so far, with his base. As a matter of fact, his base seems to have gotten more locked in as all the trouble swirls around Trump, despite all his underlings pleading guilty and cooperating with all the investigations into Trump's misdeeds....
although Trump seems to think impeachment is possible, he KNOWS the Senate will not convict him, if he does get impeached, no biggie...the likelihood of impeachment is reduced, because his term will be far into his third year before articles can be prepared, and the will of the House may be to let the investigations continue, do some of their own, then let the people vote him out in 2020....
...Trump, though, believes he can win a second term, so the statutes of limitations will prevent his being prosecuted after he leaves office...so be prepared for the continuation of the Trumpian attacks on the investigators and the minimizing of his behavior as spitting on the sidewalk ...