Republicans grappling with legacy of ex-leader

Republicans fight Democrats while Democrats battle each other.

That's the way it has been in US politics for decades, but now the party of Abraham Lincoln is the party of Donald Trump, and infighting among Republicans is showing widening fissures in the party. And some are violating Ronald Reagan's so-called Eleventh Commandment: "Thou shalt not speak ill of any fellow Republican."

Chief among them are two "formers": the former president and the former Senate majority leader Mitch McConnell.