In the final years of his life, Dick Cheney earned praise for breaking with his beloved Republican Party and defying Donald Trump, warning that Trump was a “threat to the republic.” That was commendable—and something of a counter to the efforts he made during his vice presidency to increase the power of the commander in chief and lay the foundation for the imperial presidency that Trump now seeks to establish.

Cheney pushed to expand executive power and was a key force behind the U.S.-led invasion of Iraq. FRONTLINE chronicled his influence in multiple documentaries.

Former vice president Dick Cheney is dead at 84. The controversial politician served with President George W. Bush.

Former US Vice-President Dick Cheney, a key architect of George W Bush's "war on terror" and an early advocate of the invasion of Iraq in 2003, has died at the age of 84. He died from complications of pneumonia and cardiac and vascular disease on Monday night, his family said.

Yesterday's death sentence for Saddam Hussein has outraged Sunnis and led to predictions that sectarian difference might never be resolved. But today, a draft proposal from Iraq's Shiite-dominated government offered what could be a major concession.