Why David Cameron is a surprising choice as new UK foreign policy chief

The return of former British prime minister David Cameron as Foreign Secretary is more dramatic and surprising than most political comebacks. Cameron resigned immediately after unsuccessfully advocating for Britain to vote to "remain" in the European Union during the 2016 Brexit referendum. He is not even a politician, and while his return to top government leadership as an unelected member of Parliament's House of Lords is not unprecedented, it is unusual and has raised questions about accountability. "I know it's not usual for a prime minister to come back in this way, but I believe in public service," Cameron told…