Senate Intelligence Committee Chairwoman Dianne Feinstein, D-Calif., said Monday there is “no doubt” former CIA Director David H. Petraeus will have to testify before Congress about the terrorist attack on the U.S. consulate in Benghazi, Libya.

Feinstein told MSNBC that the intelligence community has refused to give her access to a trip report from Petraeus’ visit to Benghazi last month. Petraeus was scheduled to appear before both the Senate and House Intelligence Committees this week, but instead shocked the Washington establishment Nov. 9 by announcing he was resigning because of an extramarital affair.

“We have asked to see the trip report. One person tells me he has read it, and then we tried to get it, and they tell me it hasn’t been done,” Feinstein said. “That’s unacceptable. We are entitled to this trip report. And if we have to go to the floor of the Senate on a subpoena, we will do just that.

“I have no doubt now that we will need to talk with David Petraeus,” she added. “And we will likely do that in closed session. But it will be done, one way or the other.”

That’s a change of tone from just a day earlier, when Feinstein said on Fox News she wasn’t sure if the committee would call on Petraeus.