Senator Dianne Feinstein has requested interviews and documents from Dan Scavino and Brad Parscale.
Public figures including John Brennan and Joe Scarborough have said they donated.
The FBI had previously confirmed the existence of the drafted statement.
The president and his supporters are increasingly attacking the special counsel and his team.
Wray appeared before the House Judiciary Committee after Trump said the reputation of the bureau was "in tatters."
Representative Matt Gaetz and others are calling for answers about Comey's handling of the Clinton emails probe.
In an extraordinary attack Sunday, the president said the agency was in "tatters."
The new Netflix series is unapologetically female forward.
Earlier this month, the actress said Ratner forced her to perform oral sex on him. She has now revealed an encounter with Weinstein, as well.
The FBI had previously said the bureau began drafting a statement about Clinton months before interviewing her.
The assessment, from August, blamed "perceptions of police brutality" for violence against officers.
"I don't cast films according to Harvey Weinstein's erection," Michael Caton-Jones said he told the press at the time.
Attorney General Jeff Sessions will attend instead of the president.
The address was the former FBI director's second public appearance since Trump fired him in May.
A deputy has been filling in as director since Rick Knabb left in May.
Senators Chuck Grassley and Lindsey Graham of the Senate Judiciary Committee detailed the information in a letter to new FBI Director Christopher Wray.
Both of CW's latest developments are written and produced by women.
"The memo is less insane than one would have guessed," says a former Obama administration communications director.
Trump tweeted in July: "Problem is that the acting head of the FBI & the person in charge of the Hillary investigation, Andrew McCabe, got $700,000 from H for wife!"
"Time will tell, time will tell," Trump said on Tuesday about Sessions.
Senator Chuck Grassley, chairman of the Senate Judiciary Committee, has championed the accusation involving Andrew McCabe for months
Anthony Scaramucci wasn't always such a fan of the Republican president.