Sen. Rand Paul Randal (Rand) Howard PaulSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill MORE (R-Ky.) said Monday that the U.S. was fighting “both sides” in a Middle East war, and expressed "mixed feelings" about airstrikes targeting the Islamic State in Iraq and Syria (ISIS).

Paul noted that many of those who were pressing for airstrikes against ISIS had also called for the U.S. to attack Syrian President Bashar Assad’s regime, which has been fighting the terror group.

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"I'm not saying I'm completely opposed to helping with arms or maybe even bombing, but I am concerned that ISIS is big and powerful because we protected them in Syria for a year," Paul said Monday in Kentucky, according to WBKO.

ISIS is one of a number of groups seeking to overthrow Assad in Syria, even as it advances and captures more territory in Iraq.

"Do you know who also hates ISIS and who is bombing them?" Paul said. "Assad, the Syrian government. So a year ago, the same people who want to bomb ISIS wanted to bomb Syria last year.

“Syria and ISIS are on opposite sides of the war,” he continued. “We're now bombing both sides of one war that has spread into another country."

The U.S. is providing assistance to some moderate anti-Assad rebel groups but President Obama has not authorized airstrikes in Syria.

Paul is exploring a presidential run in 2016.

He has drawn criticism from fellow Republicans for pushing a more restrained foreign policy. Texas Gov. Rick Perry Rick PerryOVERNIGHT ENERGY: Democrats push resolution to battle climate change, sluggish economy and racial injustice | Senators reach compromise on greenhouse gas amendment stalling energy bill | Trump courts Florida voters with offshore drilling moratorium OVERNIGHT ENERGY: Trump signs major conservation bill into law | Senate votes to confirm Energy's No. 2 official | Trump Jr. expresses opposition to Pebble Mine project Senate votes to confirm Energy's No. 2 official MORE (R), another potential presidential contender, has slammed Paul as an "isolationist."

Paul defended his foreign policy views on Monday.

"There are a lot of people, Independent or Democrat, that would like a reasonable foreign policy where we're not always at war, where we are reluctant to go to war, where we have more of a moderate foreign policy, I think is appealing to a lot of people," Paul said. "I think Democrats fear that."