They are the latest Republican figures to weigh in on the backlash to Donald Trump’s latest remarks blaming “both sides” for violent clashes in Virginia.
It culminated with a woman’s death and nearly 20 wounded when a car ploughed into a crowd at the far-right rally.
On Wednesday, Mr Trump disbanded his jobs councils amid an exodus of CEOs.
Representatives from companies like Merck, Under Armour, and Intel had quit the group over Mr Trump’s reaction to the events in Charlottesville.
Republican elected officials around the country expressed outrage when Mr Trump appeared to defend the organisers.
“As we pray for Charlottesville, we are reminded of the fundamental truths recorded by that city’s most prominent citizen in the Declaration of Independence: we are all created equal and endowed by our Creator with unalienable rights,” a statement from the two former presidents said.
“We know these truths to be everlasting because we have seen the decency and greatness of our country.”
The violent clashes in Charlottesville, Virginia, on Saturday have sparked a heated debate on US race relations.