US presidential candidate Donald Trump urged the White House during a campaign speech on Wednesday evening to let Russia fight ISIL because the Russians want to prevent terrorists from entering their country.
"You have Russia wanting to fight ISIS [ISIL]," Trump said at a town hall meeting in South Carolina. "Let Russia fight ISIS... they don't want ISIS coming into Russia."
The Obama administration has been critical of Russia's support for Syrian President Bashar Assad in the fight against ISIL.
Moscow has urged the US-led coalition against the Islamic State to join forces with the Syrian government in its fight against the violent Islamist extremists.
On Tuesday, Secretary of State John Kerry said that Washington was prepared to immediately begin a dialogue with Russia on the war in Syria.
On Sunday, Kerry stated he would meet with Russian Foreign Affairs Minister Sergey Lavrov to discuss the Syrian civil war at the upcoming UN General Assembly meetings in New York.
Donald Trump is the frontrunner for the Republican presidential nomination, garnering more than 30 percent of likely voter support in recent polling. Presidential candidates Hillary Clinton and Donald Trump got 38 and 31 percent of support respectively in a Bloomberg poll released on Wednesday.