Republican Ryan Zinke to step down as US congressman

Zinke, interior secretary during Trump's first term, cites health problems and declines to run again in Montana

Ryan Zinke, a Montana Republican who served as interior secretary during Donald Trump's first administration, said he would not seek re-election to a fifth term in the US House, citing health concerns.

The decision gives Democrats an outside chance to pick up a House seat in a state that has veered to the right politically over the past decade.