I keep hearing, there is nothing to investigate:
1. Trump asked the FBI director to stop investigating Michael Flynn, who had been his campaign adviser and national security adviser, and who had already committed a crime by lying to the FBI. That should be investigated.
2. After AG Sessions recused himself from the Russian investigation on the advice of DoJ ethics lawyers, Trump directly asked Sessions to reverse his recusal so that he could retain control over the investigation and help the president. That should be investigated.
3. Trump directed the White House counsel, Don McGahn, to have Special Counsel Mueller removed on the basis of pretextual conflicts of interest that Trump’s advisers had already told him were “ridiculous” and could not justify removing the special counsel. That should be investigated.
4. When that event was publicly reported, Trump asked that McGahn make a public statement and create a false internal record stating that Trump had not asked him to fire the special counsel, and suggested that McGahn would be fired if he did not comply. That should be investigated.
5. Trump asked Corey Lewandowski, his former campaign manager, to tell AG Sessions to limit the special counsel’s investigation only to future election interference. Trump said Lewandowski should tell Sessions he was fired if he would not meet with him. That should be investigated.
These events need to be hashed out, Trump is invoking executive privilege to prevent the background information from being shared with Congress, so their own investigation is necessary.
These are very likely impeachable offences that Congress MUST INVESTIGATE.