Ivanka Trump and Donald Jr wanted for interviews by House committee – live

  • Elijah Cummings seeks talks with Trump’s children
  • Trump’s summit with Kim Jong-un collapses after negotiations fail
  • Sign up to the US briefing and get a new perspective

9.46pm GMT

New polling out of the University of New Hampshire has neighboring senator Bernie Sanders in first place, trailed closely by Joe Biden, who still has no decided whether he will run for president.

Po...