The special counsel still wants to question the president over his actions while in the White House — Tuesday's answers only covered Russian hacking during the 2016 election. It's a fight that could result in a historic subpoena and eventual Supreme Court ruling, pulling a defiant Trump into a legal squabble that could set groundbreaking precedent for presidential investigations for years to come. Depending on how the battle plays out, House Democrats may even try to pounce and launch impeachment proceedings.

Things could get explosive fast. Next comes the perilous round of negotiations between Trump’s lawyers and Mueller’s prosecutors covering topics like Trump's intentions when firing FBI Director James Comey in May 2017. That line of questioning — which Trump says he shouldn't have to answer — is tied to Mueller's ongoing obstruction of justice investigation. 

https://www.politico.com/story/2018/11/20/mueller-investigation-trump-answers-1009350