The dossier includes a number of salacious claims about the Trump campaign's ties to Russian officials, including allegations about Mr Cohen that have not been verified.
"Let me be totally clear that the allegations raised against me in the public square and raised largely by BuzzFeed, Fusion GPS and others in the press are based upon misinformation, unnamed or unverifiable sources", Cohen told CNN.
Cohen said he is mentioned in the dossier 15 times.
After he won the election, Fusion GPS allowed the dossier to fall into BuzzFeed's hands, the suit says. It was presented to two successive presidents, and has been described in detail by news outlets around the world.
In the lawsuit, Cohen claimed that BuzzFeed's decision to publish the unedited documents, which featured claims against him, harmed his reputation both personally and professionally. "Its interest to the public is obvious", BuzzFeed spokesman Matt Mittenthal said via Twitter.
In the lawsuit filed last Tuesday in the NY state court, Cohen states that even though Buzzfeed claimed that the dossier had unverified information, they failed to clarify the reports with him. These allegations have affected Cohen's career. Any misstep might give his supporters more ammunition to label news outlets as biased.
Week 17 New England Patriots Takeaways
New Patriots linebacker James Harrison (92) is congratulated by members of the End Zone Militia after Sunday's win over the Jets . The Jets played hard in a meaningless game but they continued their season-long trend of committing too many penalties (9-84).
The committee is in the process of scheduling eight witnesses including Federal Bureau of Investigation agent Peter Strzok and Federal Bureau of Investigation lawyer Lisa Page, who exchanged anti-Trump text messages during an affair and previously worked on the special counsel's Russian Federation probe; Federal Bureau of Investigation general counsel James Baker, who was reassigned; Federal Bureau of Investigation head of counterintelligence Bill Priestap, whom ex-FBI boss James Comey testified made the decision not to brief Congress about the Russian Federation case during last year's election; Federal Bureau of Investigation special agent and chief of staff James Rybicki; and Federal Bureau of Investigation congressional liaison Greg Brower. This is why The New York Times posts leaked audio recordings, and why news organizations routinely publish raw court documents underlying their articles.
Buzzfeed News broke ranks and published the 35-page dossier days later.
"Without the dossier, Americans would have found it hard to understand the actions of their elected representatives and government officials", Smith wrote.
Since then, congressional probes have revealed that FBI officials involved in the investigation at the time had also expressed personal enmity for Trump and discussed an "insurance plan" in the case of Trump's election.
Smith made this argument in the op-ed: "I haven't had a single person approach me to say, 'I wish I hadn't read the dossier, and wish I had less insight into the forces at play in America.' Do you feel that way?" He provided the complaint and a confirmation email from the court system that he had filed the suit to Bloomberg News, but it could not immediately be independently confirmed that the suit had been filed.
Fusion GPS similarly faces several lawsuits related to its work on the dossier.