Donald Trump's defense is that the FBI is a deep state full of Obama people out to get him just as they were in the 2016 election. That is worthy of a belly laugh, since while the FBI was keeping secret their investigation into Trump during the campaign, Comey twice announced to public they had Clinton and her emails under investigation , which played into her defeat, causing her polls to crash each time. Furthermore, every major player on the FBI, Mueller probe, and judges approving surveillance warrants, are also registered Republicans.
The GOP Congress has done more than just nothing. They have become Trump's active partners in his attempt to cripple Mueller's criminal investigation of Trump, a subject of the investigation, by demanding investigations of the investigators and unmasking of FBI informants, and whether Mueller and the FBI followed procedure when asking judges to approve search warrants. Now Mueller's boss, Assistant Attorney General Rod Rosenstein, is under a threat of firing, impeachment, or contempt of Congress.unless evidence found to date be turned over to them to help with Trump's defense., a violation of every principle and process of criminal investigation. This adds fuel to Trump's vulnerability to impeachment articles for obstruction of justice.
The House Intelligence Committee headed by a GOP Trump loyalist, Rep. Devin Nunes, cut short their investigation, refused to call key witnesses, and announced there was no there, there. A Senate committee showed more spunk, concluding there was some “there there”, that Russians did interfere in the 2016 elections. Duh. Their findings were issued after the text of Mueller's indictments of thirteen Russians provided the evidence and social media ads and bots paid for by Russians were revealed to the public.
In the meantime, the GOP Senate is attempting to control an independent judiciary for future years, fast tracking approval of nominees to 140 lifetime positions as judges in federal courts who pass GOP ideological public policy litmus tests instead of showing a devotion to rulings based on independent judgement and legal precedent.