Sen. Mitt Romney Willard (Mitt) Mitt RomneyThe Memo: Warning signs flash for Trump on debates GOP votes to authorize subpoenas, depositions in Obama-era probe Overnight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' MORE (R-Utah) said on Thursday that a GOP investigation into Hunter Biden and Ukrainian gas company Burisma "appears political," and that people are “tired” of political investigations.

“There's no question but that the appearance of looking into Burisma and Hunter Biden appears political, and I think people are tired of these kind of political investigations,” Romney told reporters.

Romney’s skepticism could signal a significant roadblock for Senate Homeland Security and Governmental Affairs Committee Chairman Ron Johnson Ronald (Ron) Harold JohnsonGOP senator blocks Schumer resolution aimed at Biden probe as tensions run high The Hill's 12:30 Report - Presented by Facebook - Big 10 votes to resume football season GOP votes to authorize subpoenas, depositions in Obama-era probe MORE's (R-Wis.) efforts to subpoena a former consultant for a U.S. firm with ties to Burisma.

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Romney, a member of the committee, has not yet said if he will support the subpoena.

Because Sen. Gary Peters Gary Charles PetersPostal service changes delayed 7 percent of nation's first-class mail: Democratic report GOP votes to authorize subpoenas, depositions in Obama-era probe GOP sees pressure on Pelosi as key to pandemic relief deal MORE (Mich.), the top Democrat on the committee, is opposing it, Johnson will need a simple majority to issue the subpoena.

Republicans hold an 8-6 majority on the committee. That means a "no" vote from Romney will result in a 7-7 tie, which would result in the subpoena failing.