"No, Barack Obama is not the founder of ISIS," Clinton tweeted.
"Anyone willing to sink so low, so often should never be allowed to serve as our Commander-in-Chief."
Trump again roiled the presidential campaign late yesterday, telling a rally in Florida that Obama "is the founder of ISIS."
"And I would say, the co-founder would be crooked Hillary Clinton."
Republicans have long stated that the foreign policies of Obama and his then-secretary of state Clinton share blame in helping create conditions that allowed IS to grow in Iraq and Syria.
Also Read
The group flourished with Obama's withdrawal of US troops from Iraq in late 2011. Republicans said Obama was slow to recognize the threat when he said in 2014 that the Islamic State was a "JV", junior varsity team even though they gained ground in Syria and Iraq.
"It goes without saying that this is a false claim from a presidential candidate with an aversion to the truth and an unprecedented lack of knowledge," Clinton senior policy advisor Jake Sullivan said in a statement.
Sullivan warned that Trump was "echoing the talking points of (Russian President Vladimir) Putin and our adversaries to attack American leaders and American interests, while failing to offer any serious plans to confront terrorism or make this country more secure."
The Democratic National Committee weighed in, saying Trump "should apologize for his outrageous, unhinged and patently false suggestions."
But today, Trump doubled down, telling homebuilders in Miami Beach, Florida that Obama and Clinton were "the founders of ISIS."
"ISIS will hand her the most valuable player award," he said of Clinton, 68.
Disclaimer: No Business Standard Journalist was involved in creation of this content