Today could be a huge day for the Russia probe, as Mueller drops more documents on Cohen and Manafort, and James Comey testifies to Congress

The president’s lawyers have resumed discussions with the office of special counsel Robert Mueller in recent days, the first time that's been acknowledged since President Donald Trump submitted written responses to questions regarding the possibility of collusion between his 2016 campaign and Russia, two people familiar with the matter told NBC News on Thursday.
The president submitted answers to some questions on Nov 20th. At the time, his lawyers said publicly that he would only answer questions regarding the Russia probe and nothing regarding the possibility of obstruction of justice.
The sources would not characterize the nature of the discussions: whether Mueller is pressing for an in-person interview, or how close the process is to wrapping up.
Joyce Vance, a former federal prosecutor and an MSNBC contributor, told NBC news the next logical step for prosecutors would be to focus on two types of further inquiries. The first would be follow-up questions.
"They may ask for clarification or additional information on some of the answers," Vance said.
"The second is they will reopen the conversation about whether the president will submit to an in-person-interview," she added.
When asked about the timing, Vance said: "The timeline makes sense. We're coming into the holidays, they likely don’t want to let it lag for too long. If they want to follow up before the holidays, then this week would be the time to do that."Jay Sekulow, one of the president’s outside attorneys told NBC News: "We don’t’ discuss conversations we’ve had or have not had with the special counsel.”
Rudy Guiliani, who also represents Trump privately, declined comment.
Chuck Rosenberg a former federal prosecutor who once served as chief of staff to Mueller when he was FBI director said, "it’s not uncommon for the two sides in a big case to be talking all the time."
Trump has repeatedly denied knowledge of any collusion between his campaign and Russia, which interfered with the 2016 election, according to the official U.S. intelligence assessment. The president has also repeatedly referred to the investigation as a "witch hunt."
After taking a three-day break from criticizing the investigation led by Special Counsel Robert Mueller, President Donald Trump returned Friday morning to using his Twitter account to attack and undermine the Mueller probe.
Trump’s tweets come on the morning of what many are expecting to be a big news day for the investigation into collusion between the Trump campaign and Russian interference into the 2016 general election.
Mueller’s office has a Friday deadline to detail the accusation of Paul Manafort lying to investigators and breaking his cooperation deal. Additionally, the special counsel’s office and federal prosecutors in Southern District of New York are providing sentencing memos for Trump’s former lawyer Michael Cohen. These documents should detail how Cohen cooperated in multiple investigations.
The Commander in Chief tweeted:
Robert Mueller and Leakin’ Lyin’ James Comey are Best Friends, just one of many Mueller Conflicts of Interest. And bye the way, wasn’t the woman in charge of prosecuting Jerome Corsi (who I do not know) in charge of “legal” at the corrupt Clinton Foundation? A total Witch Hunt...
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....Will Robert Mueller’s big time conflicts of interest be listed at the top of his Republicans only Report. Will Andrew Weissman’s horrible and vicious prosecutorial past be listed in the Report. He wrongly destroyed people’s lives, took down great companies, only to be........
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.....overturned, 9-0, in the United States Supreme Court. Doing same thing to people now. Will all of the substantial & many contributions made by the 17 Angry Democrats to the Campaign of Crooked Hillary be listed in top of Report. Will the people that worked for the Clinton....
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....Foundation be listed at the top of the Report? Will the scathing document written about Lyin’ James Comey, by the man in charge of the case, Rod Rosenstein (who also signed the FISA Warrant), be a big part of the Report? Isn’t Rod therefore totally conflicted? Will all of....
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(Note – Trump is clearly still tweeting. We will update this post as Tweets are released)
Trump’s tweetstorm introduces some new plotlines and characters in this unfolding story. First of all, Trump claims that he does not know conspiracy theorist and conservative writer Jerome Corsi, who claimed to be refusing a plea deal with Mueller because he refused to perjure himself as Mueller directed.
There was no substantiation to that claim, however, and Corsi has also claimed to have gotten to know Trump through their mutual interest in “birtherism.” Both Trump and Corsi seemed to believe that Barack Obama was not born in the United States. Corsi published a book titled Where is the Birth Certificate. 
There is also the introduction of Andrew Weissmann (who Trump misspelled as Weissman.) Weissmann is a US Attorney working in Mueller’s investigation and has been described by the NY Times as Muellers’ “legal pit bull. ”
This most recent tweetstorm seems to be just another example of Trump’s “the best defense is a good offense” approach, though reasonable people might also see the diminishing returns of such a tactic on full display.