FYI: Timeline of Russia Investigation- from June 2015 till now
https://www.factcheck.org/2017/06/timeline-russia-investigation/
2015
June 16 Trump announces that he is running for president.
July The Main Intelligence Directorate, or GRU, which is responsible for intelligence collection for the Russian military, gains access to the Democratic National Committee computer network and maintains that access until at least June 2016, when the hacking plot was publicly disclosed. (This is according to a report issued Jan. 6, 2017, by the Office of the Director of National Intelligence.)
Oct. 13 Felix Sater, a Trump business associate, sends an email to Michael Cohen, executive vice president of the Trump Organization, about a proposal to build a Trump-branded residential and commercial building in Moscow. Saters email includes a letter of intent signed by Andrey Rozov, owner of I.C. Expert Investment Co., of Moscow, to build Trump World Tower Moscow. Sater, an American citizen who was born in Russia, tells Cohen to have Trump sign the agreement and send it back. The agreement would have given the Trump Organization a $4 million upfront fee, no upfront costs, a percentage of the sales, and control over marketing and design. Sater writes, Lets make this happen and build a Trump Moscow. And possibly fix relations between the countries by showing everyone that commerce & business are much better and more practical than politics. That should be Putins message as well, and we will help him agree on that message. (CNN would later obtain a copy of the email and the agreement.)
Oct. 28 Trump signs a letter of intent with a Moscow-based developer, I.C. Expert Investment Co., to pursue Trump Tower Moscow a licensing project in which Trump would be paid for the use of his name on a building in Moscow. (Cohen would later disclose the project in a statement provided to congressional investigators on Aug. 28, 2017, according to the Washington Post. The decision to pursue the proposal initially, and later to abandon it were unrelated to the Donald J. Trump for President Campaign, Cohen told Congress.)