I don't expect Mr. Durham's work will lead to a criminal investigation of either man.
"I want to do it before the election - I want to get all the information out there", Graham told reporters in the Capitol on Tuesday.
Graham dismissed the allegations and said he had been planning the investigation "for a long time".
"Based on our investigation and recent press reports, we are increasingly concerned that the surveillance of USA persons affiliated with the Trump campaign began earlier than the opening of the FBI's Crossfire Hurricane investigation in late July 2016", the letter proceeded. "I gave Mueller all the space he needed to do his job". Trump in January 2017 said the letter was "beautiful". This is especially as Trump has bombarded the former president with many accusations, from supposedly trying to hurt his administration just before his inauguration to committing an unspecified crime that he described as the biggest political crime in the country's history.
For decades, the first-term president as a show of appreciation held ceremonies in the East Room to unveil portraits of their closest predecessors.
Graham has announced his committee plans to vote on June 4 on a broad authorization to subpoena witnesses and documents related to the FBI's Russian Federation investigation that became former special counsel Robert Mueller's probe, and foreign surveillance warrants obtained on a Trump adviser. This includes any individual referenced in Horowitz's report, as well as "any current or former executive branch official or employee" involved in the Crossfire Hurricane investigation, including reports prepared by former British Intelligence officer Christopher Steele, also referred to as the "Steele dossier".
"I will say this, we have an honorable attorney general".
The criticism was stepped up two weeks ago when the department moved to dismiss charges against Mr Trump's former national security adviser Michael Flynn, who had pleaded guilty to lying to the Federal Bureau of Investigation.
"There were career and intelligence professionals, many of whom operate undercover, but there were a lot of partisan officials as well", Cotton said about the list of Obama officials revealed to have sought Flynn's identity.
Democratic presidential candidate former United States vice president Joe Biden speaks about the coronavirus, in Wilmington, Delaware, March 12, 2020.