Special Counsel Robert Mueller said that by September 1st he will to finish his investigation into whether President Trump obstructed the Russia inquiry, according to Rudy Giuliani, Trump's attorney on the matter. Waiting any longer to do so would risk improperly influencing voters going into the midterm elections in November, Giuliani added according to the NYT, reflecting comments made earlier Sunday by Trump in a charged tweet.

Now that the Witch Hunt has given up on Russia and is looking at the rest of the World, they should easily be able to take it into the Mid-Term Elections where they can put some hurt on the Republican Party. Don’t worry about Dems FISA Abuse, missing Emails or Fraudulent Dossier! — Donald J. Trump (@realDonaldTrump) May 20, 2018

Mueller reportedly informed the Trump administration of his timeline two weeks ago amid negotiations over the terms under which Trump will be questioned by investigators.

Mr. Giuliani’s comments were an apparent attempt to publicly pressure Mr. Mueller amid their interview negotiations. He urged that the investigation be wrapped up as soon as possible, pointing as a cautionary tale to the revelation by the former F.B.I. director James B. Comey in the last days of the 2016 presidential race that he was reopening the investigation into Hillary Clinton’s use of a private email server. Mr. Comey’s announcement is widely blamed by Democrats for costing her the election. The F.B.I. found no wrongdoing. -NYT

"You don’t want another repeat of the 2016 election where you get contrary reports at the end and you don’t know how it affected the election," said Giuliani.

That said, the question over obstruction is just one piece of the special counsel's broader inquiry into Russian interference in the 2016 US election. This effort has resulted in nearly two-dozen indictments, including 13 Russian nationals and three Russian companies on conspiracy charges related to an alleged Russian propaganda effort run out of a "troll farm."

Giuliani is framing the outcome of Mueller's obstruction probe as pitting the credibility of Trump vs. former FBI Director James Comey - who accused Trump of trying to end the investigation into former National Security Advisor, Mike Flynn.

“We want the concentration of this to be on Comey versus the president’s credibility, and I think we win that and people get that,” Mr. Giuliani said, adding that he also would like to see a criminal perjury investigation by the Justice Department into Comey for his role in leaking information cited in New York Times reports last year about his encounters with the president, prompting Mueller’s appointment.

Trump would like the results of Mueller's obstruction inquiry to be made public, according to Giuliani. Trump and his legal team, meanwhile, continue to negotiate with Mueller's team over his interview.

Mr. Giuliani said that he and Mr. Mueller’s office were still hammering out the terms of an interview with the president. He portrayed his client as a willing interview subject, saying that in the president’s view, no evidence exists that his associates coordinated with Russia’s election interference. Mr. Giuliani said that an interview would be a distraction for the president and that the amount of preparation required meant that the president could not sit for questioning until after the scheduled summit meeting between Mr. Trump and the North Korean leader, Kim Jong-un, on June 12 in Singapore. Based on that schedule, Mr. Giuliani said, the president could be questioned around Independence Day. -NYT

In other words, Trump won't talk to Mueller until after June 12 - ostensibly after he's brokered a North Korean denuclearization agreement, and as recent revelations over the Obama DOJ/FBI spying on his campaign mature through Congressional investigations. By that time, if the talks with North Korean leader Kim Jong Un are a success, Trump may well be on his way to earning a Nobel peace prize (at least according to online bookies) and perhaps have built up enough public support to simply fire Rosenstein, Sessions and Mueller altogether.