House Republican Conference Chairwoman Liz Cheney Elizabeth (Liz) Lynn CheneyGOP lawmakers distance themselves from Trump comments on transfer of power Graham vows GOP will accept election results after Trump comments Liz Cheney promises peaceful transfer of power: 'Fundamental to the survival of our Republic' MORE (R-Wyo.) said on Wednesday the U.S. should consider a “proportional military response" against Iran, among other potential actions, over its suspected involvement in drone attacks on Saudi Arabia's oil supply.

The position from Cheney comes as Republicans such as Sen. Lindsey Graham Lindsey Olin GrahamLincoln Project mocks Lindsey Graham's fundraising lag with Sarah McLachlan-themed video The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election Trump dumbfounds GOP with latest unforced error MORE (S.C.) are calling on President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE to pursue additional action after earlier Wednesday saying the U.S. would impose additional sanctions on Iran.

"Not acting sends a message, frankly, that's likely to encourage an additional escalation by the Iranians if they feel they can take this kind of action without a response. So I'm pleased to see that we've begun to see some of that response," Cheney said.

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"I also think that a proportional military response is the right way to go, and I'm hopeful that Secretary Pompeo is coordinating in that regard with the Saudis," she added, referring to Secretary of State Mike Pompeo Michael (Mike) Richard PompeoWatchdog confirms State Dept. canceled award for journalist who criticized Trump Trump's push for win with Sudan amps up pressure on Congress Putin nominated for Nobel Peace Prize MORE.

She also advocated the U.S consider pursuing additional United Nations sanctions in response.

Trump on Wednesday said that he has instructed Treasury Secretary Steven Mnuchin Steven Terner MnuchinThe Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Vulnerable Democrats tell Pelosi COVID-19 compromise 'essential' MORE to “substantially” increase economic sanctions on Iran.

Trump administration officials have blamed Iran for drone attacks on two Saudi oil sites over the weekend, though the president himself has not yet definitely pinned the blame on Tehran.

Graham, another leading GOP lawmaker on foreign affairs, has voiced skepticism over the administration taking a more cautious approach with Iran, with the South Carolina Republican arguing on Wednesday that increased sanctions are not enough to prevent Iran from taking similar action in the future.

Graham and Trump had disagreed on how to respond on Iran Tuesday, in a rare sign of discord among two allies.

Cheney, who's believed to be considering running for Senate next year, has emerged as one of the leading GOP voices on foreign policy and defense, often advocating a more hawkish U.S. response.

That has put her at odds with other GOP lawmakers like Sen. Rand Paul Randal (Rand) Howard PaulRon Paul hospitalized in Texas The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Rand Paul says he can't judge 'guilt or innocence' in Breonna Taylor case MORE (R-Ky.), with whom she recently engaged in a Twitter feud. The Wyoming Republican has argued that Americans are not supportive of Paul's "isolationist" views, while he has accused her of "warmongering."

Meanwhile, House Minority Whip Steve Scalise Stephen (Steve) Joseph ScaliseGinsburg becomes the first woman to lie in state in the Capitol House GOP slated to unveil agenda ahead of election House panel details 'serious' concerns around Florida, Georgia, Texas, Wisconsin elections MORE (R-La.) said sanctions have proven to be an effective strategy in the past, adding that the U.S. needs to focus on preventing Iran from “advancing towards a nuclear weapon.”

“I think it's one of the reasons you're seeing Iran act out is because what President Trump has been doing to stand up to Iran has been effective,” he told reporters.

“But you know, Iran has proven to the world right now why they can't be trusted with a nuclear weapon. ... The president is weighing his options as he should, but he's proven that he's willing to stand up to bullies around the world, and Iran is one of the biggest.”