FORT WORTH, Texas, Oct. 8 (UPI) — Former President Jimmy Carter was critical of current foreign policy in a wide-ranging interview, saying the United States “waited too long” to engage the Islamic State.

Carter added he found it difficult to understand President Barack Obama’s foreign policy.

While former presidents typically do not offer opinions on the actions of sitting presidents, Carter often expresses his views on current global affairs.

On other topics, Carter said he would support whoever is the Democratic nominee for the presidency in 2016; that the non-profit human rights organization The Carter Center is involved only indirectly with the battle against the Ebola virus in Liberia; and that he considers persecution against women “the worst human rights violation on earth right now.”

Carter, 90, was in Fort Worth to help build a Habitat for Humanity project.