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.
His office said it removed Peter Strzok over allegations about text messages.
Revenge is sweet—and best served on social media.
Could Trump be indicted for having obstructed justice?
Trump's son-in-law and adviser argued Comey was unpredictable, sources say.
The FBI had previously said the bureau began drafting a statement about Clinton months before interviewing her.
Mueller's investigators have been interested in Kushner, who is also a White House senior adviser, as part of its probe into Russian meddling in the 2016 election, with particular interest in Comey's firing.
The assessment, from August, blamed "perceptions of police brutality" for violence against officers.
James Comey is clapping back at Donald Trump with the title of his upcoming book, "A Higher Loyalty: Truth, Lies, and Leadership."
Comey may simply have gone to Iowa to attend a family birthday dinner.
The chief of staff had said the congresswoman once claimed to have secured funding for the facility.
Speaking at the National September 11 Memorial and Museum, Wray also made comments about the Las Vegas mass shooting.
Donations to RNC legal fund paying Russia investigation lawyers shows $193,400 from Cambridge Analytica's Mercer and wife.
The Senate Judiciary Committee had spent weeks negotiating to meet with Jim Rybicki and Carl Ghattas.
Attorney General Jeff Sessions will attend instead of the president.
Grassley said the Office of the Special Counsel had to sign nondiscolosure agreements.