Don't think the left will stop at banning the Confederate battle flag, Rush Limbaugh warned his radio audience on Tuesday — the American flag is next."The next flag that will come under assault, and it will not be long, is the American flag," Limbaugh said on his syndicated radio show "If you take a look at the timeline of progressive events, their speed and rapidity with which the left is conducting this assault on all of these American traditions and institutions, if you don't think the American flag's in their crosshairs down the road, you had better stop and reconsider," he said.Limbaugh stressed that he isn't arguing to keep the Confederate flag that some Southerners see as a sign of regional pride, but others say invokes slavery and Jim Crow segregation-era laws."The point is, as with everything else the left does, what they tell you they're irritated about is not where it ends," he said.The South Carolina state legislature has voted to heed Gov. Nikki Haley's call to have a special session to discuss moving the flag from the Capitol grounds following the shooting deaths of nine black church members at Emanuel AME Church last week by a white man. Survivors said he told the victims he was killing them because they were black.Since then, the Republican Mississippi House speaker has said the state should remove the emblem from its official state flag, and retailers from Wal-Mart to Amazon have said they will stop selling items with images of the flag. Dylann Roof , the suspect in the church killings, can be seen in online photos waving the Confederate flag and burning the American flag. He also had patches of the white-ruled Rhodesian and apartheid South African flags on his jacket.Republicans and Democrats alike have united in calling for removal of the Confederate flag on government property. Limbaugh said he, too, agreed with the move, but warned Republicans to be aware Democrats won't stop there.He called the effort an attempt by the left "to segregate and isolate the entire South and to sort of Alinsky it. You know, the 'Rules for Radicals,' you seek the target, you isolate it, you attack it, humiliate it."The flag represents to the left what it believes is the last remaining Republican electoral stronghold in terms of presidential politics: the South, he said."It is about destroying the South as a political force," Limbaugh said. "It's about isolating, targeting, and identifying the South as Dylann Roof. Not Charleston, South Carolina, the South. That's what the leftists' effort on the Confederate flag are."