(CNN) Here's a look at hacking incidents during the 2016 presidential race between Donald Trump and Hillary Clinton. For details about investigations into hacking and efforts to interfere with the election, see 2016 Presidential Election Investigation Fast Facts.

November 2015 - The FBI reaches out to the DNC again, warning them that one of their computers is transmitting information back to Russia. DNC management later says that IT technicians failed to pass along the message that the system had been breached.

March 19, 2016 - Hillary Clinton's campaign chairman John Podesta receives a phishing email masked as an alert from Google that another user had tried to access his account. It contains a link to a page where Podesta can change his password. He shares the email with a staffer from the campaign's help desk. The staffer replies with a typo - instead of typing "This is an illegitimate email," the staffer types "This is a legitimate email." Podesta follows the instructions and types a new password, allowing hackers to access his emails.

May-June 2016 - The hackers steal thousands of emails from the DNC server and begin to conceal their efforts.

June 12, 2016 - During an interview on British television, During an interview on British television, WikiLeaks founder Julian Assange says that the website has obtained and will publish a batch of campaign emails.

September 1, 2016 - During an interview with Bloomberg News, During an interview with Bloomberg News, Russian President Vladimir Putin says that he and the Russian government have no ties to the hackers. He says that the identity of the culprit or culprits is not as important as the content of the leaks and ultimately the hackers have revealed important information for voters.

September 22, 2016 - Democrats Dianne Feinstein and Adam Schiff, ranking members of the Senate and House Intelligence Committees, Democrats Dianne Feinstein and Adam Schiff, ranking members of the Senate and House Intelligence Committees, issue a joint statement declaring that based on information they received during congressional briefings, they believe Russian intelligence agencies are carrying out a plan to interfere with the election. They call on Putin to order a halt to the activities.

September 26, 2016 - Trump questions whether the DNC cyberattack was carried out by a state-sponsored group or a lone hacker. "It could be Russia, but it could also be China. It could also be lots of other people. It also could be somebody sitting on their bed that weighs 400 pounds." During a presidential debate, Trump questions whether the DNC cyberattack was carried out by a state-sponsored group or a lone hacker. "It could be Russia, but it could also be China. It could also be lots of other people. It also could be somebody sitting on their bed that weighs 400 pounds."

October-November 2016 - Over the course of a month, Over the course of a month, WikiLeaks publishes more than 58,000 messages hacked from Podesta's account.

October 6, 2016 - DC Leaks publishes a batch of documents stolen from Clinton ally Capricia Marshall.

October 7, 2016 - The Department of Homeland Security and the Office of National Intelligence on Election Security The Department of Homeland Security and the Office of National Intelligence on Election Security issue a statement declaring that the intelligence community is "confident that the Russian Government directed the recent compromises of emails from US persons and institutions." According to the statement, document releases on websites WikiLeaks and DCLeaks mirror the methods and motivations of past Russian-directed cyberattacks.

December 11, 2016 - Sources tell CNN that although US intelligence agencies share the belief that Russia played a role in the computer hacks, there is disagreement between the CIA and the FBI about the intent of the meddling. While the CIA assessment shows that the Russians may have sought to damage Clinton and help Trump, the FBI has yet to find proof that the attacks were orchestrated to elect the Republican candidate, according to unnamed officials. Furthermore, some sources say the hackers also infiltrated the Republican National Committee's computers.

December 12, 2016 - A source with knowledge of the investigation says that even though hackers breached the GOP computers, they opted not to release documents. CNN reports that Russian hackers accessed computer accounts of Republican lawmakers and GOP organizations. A source with knowledge of the investigation says that even though hackers breached the GOP computers, they opted not to release documents.

December 13, 2016 - of the DNC's delayed response to initial warnings in September of 2015 that its network had been infiltrated by hackers. The report outlines how phishing emails and communication failures led to a sweeping cyberattack. The story also lays out evidence that Guccifer 2.0 and DCLeaks were linked to Russia. The New York Times publishes a detailed account of the DNC's delayed response to initial warnings in September of 2015 that its network had been infiltrated by hackers. The report outlines how phishing emails and communication failures led to a sweeping cyberattack. The story also lays out evidence that Guccifer 2.0 and DCLeaks were linked to Russia. A second article in the Times chronicles the hacking of the DCCC. According to the report, Guccifer 2.0 stole tens of thousands of documents and offered them to reporters in districts where Democratic candidates were engaged in competitive races for House seats.

December 29, 2016 - The order names six Russian individuals who allegedly took part in the hacking. Additionally, 35 Russian diplomats are ordered to leave the United States within 72 hours. Obama issues an executive order with sanctions against Russia. The order names six Russian individuals who allegedly took part in the hacking. Additionally, 35 Russian diplomats are ordered to leave the United States within 72 hours.

January 3, 2017 - Assange says that the Russian government did not provide him with the hacked DNC emails Assange says that the Russian government did not provide him with the hacked DNC emails during an interview with Sean Hannity on the Fox News Channel.

January 3-4, 2017 - In a series of tweets, In a series of tweets, Trump questions the US intelligence community's claims that the Russian government interfered with the election. He alleges that intelligence officials have delayed a scheduled meeting with him but sources tell CNN that there has been no change to the schedule. Trump also cites Assange's interview to back his assertion that a rogue hacker, not the Russian government, may have meddled in the election.

January 5-6, 2017 - Intelligence officials meet separately with Obama and Trump to present the results of their probe into cyber espionage during the presidential campaign. After the president and the president-elect are briefed, the Office of the Director of National Intelligence releases a Intelligence officials meet separately with Obama and Trump to present the results of their probe into cyber espionage during the presidential campaign. After the president and the president-elect are briefed, the Office of the Director of National Intelligence releases a declassified version of its classified report on Russian meddling . According to the report, hackers did not breach voting machines or computers that tallied election results but Russians meddled in other ways. Putin ordered a multifaceted influence campaign that included spreading pro-Trump propaganda online and hacking the DNC and Podesta, according to the report. Bracing for a possible Clinton win, Russian bloggers were prepared to promote a hashtag #DemocracyRIP on election night. Paid social media users shared stories about Clinton controversies to create a cloud of scandal around her campaign.

May 17, 2017 - Deputy Attorney General Rod Rosenstein appoints Deputy Attorney General Rod Rosenstein appoints former FBI Director Robert Mueller as special counsel to lead an investigation into Russian interference and related matters that could result in criminal prosecutions.

June 1, 2017 - In public remarks, In public remarks, Putin says that hacking may have been carried out by patriotic Russian citizens who felt compelled to respond to perceived slights against Russia from America. Putin says, however, that the Russian government played no role in the cyberattacks. During an interview days later, Putin says that a child could have easily committed the hacking.

June 21, 2017 - a Department of Homeland Security official says that hackers linked to the Russian government targeted voting systems in up to 21 states. During a Senate hearing, a Department of Homeland Security official says that hackers linked to the Russian government targeted voting systems in up to 21 states.

July 30, 2017 - Putin announces that 755 employees at US diplomatic missions in Russia will be ousted from their posts in response to sanctions.

September 6, 2017 - In a blog post, In a blog post, Facebook announces that more than 3,000 advertisements posted on the social network between June 2015 and May 2017 were linked to Russia. The Washington Post reports that the ads came from a Russian company called the Internet Research Agency.

July 3, 2018 - The Senate Intelligence Committee The Senate Intelligence Committee releases a report concluding that the intelligence community's January 2017 assessment of election meddling was accurate. According to the summary, the intelligence agencies were correct in their finding that the goal of the election interference was to help Trump rather than simply create confusion.

July 13, 2018 - as part of Mueller's ongoing investigation. The indictment accuses the Russians of engaging in a "sustained effort" to hack emails and computer networks associated with the Democratic party during the 2016 presidential campaign. The Justice Department announces indictments against 12 members of the Russian intelligence agency, GRU, as part of Mueller's ongoing investigation. The indictment accuses the Russians of engaging in a "sustained effort" to hack emails and computer networks associated with the Democratic party during the 2016 presidential campaign.

March 22, 2019 - and delivers his report to Attorney General William Barr. A senior Justice Department official tells CNN that there will be no further indictments. Mueller ends his investigation and delivers his report to Attorney General William Barr. A senior Justice Department official tells CNN that there will be no further indictments.

July 25, 2019 - The Senate Intelligence Committee releases the The Senate Intelligence Committee releases the first installment of its report, entitled "Russian Active Measures Campaigns and Interference in the 2016 Election: Volume 1: Russian Efforts Against Election Infrastructure."