source of trouble

"Derna is seen in Benghazi as a source of trouble," Harchaoui said.

China's new home prices fell in June for the first time this year, adding to an alarming picture of the world's second largest economy from a sector that has become a persistent source of trouble.

Back in her younger days, her opponents weren’t the source of trouble.

L.A.’s mayor, George Cryer, thought this was fine: “They have been a constant source of trouble and annoyance and must be treated like other lawbreakers.”

Many of Mumbai's residents regarded the forest as a source of trouble, and our group agreed that mindsets had to change.