Ed Pilkington, The Guardian

In this most bizarre of presidential election cycles, every day seems to bring another jaw-dropping development. Donald Trump on the size of his genitals, Ben Carson and the Egyptian pyramids, Bernie Sanders’ socialist revolution, Hillary Clinton and the cloth she used to wipe her private email server clean.

Donald Trump Jr, the eldest son of the Republican presidential frontrunner and one of his political surrogates, has granted a 20-minute radio interview to a prominent white supremacist who broadcasts what has been dubbed as “the primary radio nexus of hate in America”.

In December 1999, a writer for the New York Times asked the Slovenian-born model Melania Knauss a question that at the time seemed quite fanciful. If her then boyfriend Donald Trump ever made it to the White House, what kind of first lady would she be?

Spare a thought for the Catholics of St Louis, Missouri, weighed down as they are with ponderous spiritual matters. On top of such weighty issues as the pope’s recent call for an end to the death penalty – a popular pastime in Missouri – they must now wrestle with a new moral conundrum: Girl Scout cookies.

Hillary Clinton addressed a Martin Luther King Day rally at the South Carolina state house in Columbia this morning in an attempt to shore up her support among African American voters in the south as a firewall against the surging tide of Democratic rival Bernie Sanders.