Washington (CNN) Democratic presidential candidate Joe Biden on Saturday said he would "obey any subpoena" that is sent to him -- his most forceful statement yet to clarify a previous remark that he wouldn't testify in a Senate impeachment trial

"First of all, I'm going to obey any subpoena that was sent to me," Biden said at a campaign event in Fairfield, Iowa.

The former vice president's comments come one day after he reiterated to the Des Moines Register's editorial board that he wouldn't comply with a subpoena followed by a series of attempts to clarify what he meant.

Biden originally told the newspaper he wouldn't comply "because it's all designed to deal with (President Donald) Trump doing what he's done his whole life -- trying to take the focus off him." Biden told the newspaper his testimony would enable the President to "get away" from the trial's focus.

"If I went, let's say I voluntarily, just said let me go make my case, what are you going to cover?" he asked, referring to the press. "You guys, instead of focusing on him, you're going to cover for three weeks anything I said. And he's going to get away."

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