(CNN) US Energy Secretary Rick Perry said Friday he "didn't see a problem" with being asked by President Donald Trump to speak with Rudy Giuliani about matters involving Ukraine.

In an on-air interview on Fox News, Perry defended the President's recommendation that he speak with Giuliani, Trump's personal lawyer, and denied that doing so circumvented the State Department.

"As the Governor of Texas, I used people outside of government all the time to get me information," Perry said. "I respect the State Department, but I happen to know people in the energy industry who are a lot smarter than the State Department folks. I didn't see a problem with that at all."

Perry has been subpoenaed for documents by the congressional committees in the impeachment inquiry, and his deadline to respond is Friday. The Texas Republican said he did not know whether he would be complying with that subpoena, saying the decision depends on the recommendation of the Energy Department's legal team.

"Our general counsel's taking a look at that right now, and when they send their answer in at the end of the day, and whatever their decision is, that's what I'll follow," Perry said. "I don't know if that's a yes or no yet."

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