The odds are very high that Mueller will offer a declarative public statement before the midterm elections, and very likely before Labor Day, that the president is guilty of obstruction of justice.
The Mueller declaration of obstruction of justice could be issued in the form of a letter to Congress and may or may not ultimately be issued in the form of an indictment if he believes that the Trump situation creates extraordinary circumstances that warrant his seeking approval for a formal indictment.
Consider the articles of impeachment against Richard Nixon that were passed by the House Judiciary Committee before Nixon resigned. Article 1, Section 8 of the articles of impeachment included this:
“making or causing to be made false or misleading public statements for the purpose of deceiving the people of the United States into believing that a thorough and complete investigation had been conducted with respect to allegations of misconduct on the part of personnel of the executive branch of the United States and personnel of the Committee for the Re-election of the President, and that there was no involvement of such personnel in such misconduct.”
In other words, repeatedly making false statements intended to deceive the public about matters under investigation constitute acts in furtherance of obstruction of justice in violation of American law.
While Trump is in dramatic conflict with cabinet members who warn about the Russian attack, which he falsely claims is a hoax, he attacks the free press for reporting about the Russian attack, which he falsely claims is fake news.
Mueller could argue that Trump is seeking to execute the first televised obstruction of justice, in plain view before the nation every day.
With a high probability that the obstruction issue reaches a crescendo before the midterm elections, there is now a growing likelihood that an anti-Trump wave will doom Republicans to a disastrous defeat in November.