2nd edit: what the heck, let's just quote justsecurity.org's summary of the Mueller report[2]:

"1. Trump was receptive to a Campaign national security adviser’s (George Papadopoulos) pursuit of a back channel to Putin.

2. Kremlin operatives provided the Campaign a preview of the Russian plan to distribute stolen emails.

3. The Trump Campaign chairman and deputy chairman (Paul Manafort and Rick Gates) knowingly shared internal polling data and information on battleground states with a Russian spy; and the Campaign chairman worked with the Russian spy on a pro-Russia “peace” plan for Ukraine.

4. The Trump Campaign chairman periodically shared internal polling data with the Russian spy with the expectation it would be shared with Putin-linked oligarch, Oleg Deripaska.

5. Trump Campaign chairman Manafort expected Trump’s winning the presidency would mean Deripaska would want to use Manafort to advance Deripaska’s interests in the United States and elsewhere.

6. Trump Tower meeting: (1) On receiving an email offering derogatory information on Clinton coming from a Russian government official, Donald Trump Jr. “appears to have accepted that offer;” (2) members of the Campaign discussed the Trump Tower meeting beforehand; (3) Donald Trump Jr. told the Russians during the meeting that Trump could revisit the issue of the Magnitsky Act if elected.

7. A Trump Campaign official told the Special Counsel he “felt obliged to object” to a GOP Platform change on Ukraine because it contradicted Trump’s wishes; however, the investigation did not establish that Gordon was directed by Trump.

8. Russian military hackers may have followed Trump’s July 27, 2016 public statement “Russia if you’re listening …” within hours by targeting Clinton’s personal office for the first time.

9. Trump requested campaign affiliates to get Clinton’s emails, which resulted in an individual apparently acting in coordination with the Campaign claiming to have successfully contacted Russian hackers.

10. The Trump Campaign—and Trump personally—appeared to have advanced knowledge of future WikiLeaks releases.

11. The Trump Campaign coordinated campaign-related public communications based on future WikiLeaks releases.

12. Michael Cohen, on behalf of the Trump Organization, brokered a secret deal for a Trump Tower Moscow project directly involving Putin’s inner circle, at least until June 2016.

13. During the presidential transition, Jared Kushner and Eric Prince engaged in secret back channel communications with Russian agents. (1) Kushner suggested to the Russian Ambassador that they use a secure communication line from within the Russian Embassy to speak with Russian Generals; and (2) Prince and Kushner’s friend Rick Gerson conducted secret back channel meetings with a Putin agent to develop a plan for U.S.-Russian relations.

14. During the presidential transition, in coordination with other members of the Transition Team, Michael Flynn spoke with the Russian Ambassador to prevent a tit for tat Russian response to the Obama administration’s imposition of sanctions for election interference; the Russians agreed not to retaliate saying they wanted a good relationship with the incoming administration."

[2] https://www.justsecurity.org/63838/guide-to-the-mueller-repo...