"You have to wonder now looking at this mess, and everyone saying we knew this and knew that, but looking at this mess now, is this not also a failure of oversight?" she asked.
Miller told Crowley that he has written to President Obama about wait times at VA facilities, but conceded that Congress likely played a role in the shortcomings.
"Sure, everybody probably is culpable in this, but we're doing what we've been asked to do, and that is to find out the information," he said.
“Well, what good is Congressional oversight," Crowley probed, "if you’ve all been working on it for a year or two years, or let’s face it, going back a decade, not you two specifically…"
Sanders then jumped in, noting that "clearly there are incompetent administrators." He also added that it may have a lot to do with funding.
"They're treating 6.5 million people a year, 230,000 people every single day. Is there waste in the system? Absolutely," he said. "But at the end of the day, when you have 2 million new veterans coming into the system, some with very difficult and complicated problems, I do think we have to take a hard look and see if we have the resources."
Finally, after Miller lamented that the House has made many oversight requests that VA has yet to answer, Crowley took a jab at the many subpoenas the Republican-led House has issued.
"Can't you just subpoena them?" Crowley asked. "They subpoena everyone else."
Watch the clip via CNN: