Update 5.40pm London:
Earlier: A confusing and potentially messy end to the Democratic primary phase could become clearer today.
The conversation, the fifth that Mr. Obama will have had with Mr. Sanders since the primaries began, is to be part of a choreographed series of moves Mr. Obama set in motion this week that are designed to quickly bridge the divide between the two Democratic presidential candidates laid bare in the last few months. The strategy will culminate with the president’s formal endorsement of Mrs. Clinton in the coming days, followed by an appearance with her on the campaign trail soon after.
Bernie has promised to “fight on” – whatever that means – until the Democratic Convention in Philadelphia at the end of July, but is unlikely to admit defeat until the final primary next Tuesday.
In the meantime, though, he can expect more of this…
And in voting matters elsewhere..