Gary Smith, head of the GMB Union, has claimed there is "no problem at all" when asked about allegations of bullying and misogyny within the organisation.
The UK ambassador to Washington referred to paedophile sex trafficker Jeffrey Epstein as "my best pal" in 2003 - three years before allegations against him became public.
Speaking to Sky's Wilfred Frost on his The Master Investor Podcast, Nick Clegg said the UK needed to "think long and hard" about "whether we've overdone it" with freedom of speech laws.
Other candidates are racing to catch up ahead of a crunch deadline on Thursday - but there is concern about the logistics of a key hustings event in which contenders will make their pitch to undecided voters.
The Brexit vote was largely driven by concerns about immigration, with voters buying the promise by the Leave campaign to "take back control". But as numbers soar, it's once again become the public's top issue - overtaking the economy.
Government policy post-Brexit has been the driving force behind the number of people moving to Britain in recent years - and while the numbers crossing on small boats are relatively small, those too are at record highs.