US presidential frontrunner Hillary Clinton has been forced to fight on after she and rival Bernie Sanders won one state each last night.
Clinton declared victory in Kentucky, while Sanders took Oregon.
Though Clinton is leading in the number of delegates, Sanders continues to win in some states and mount serious challenges in others.
By staying in the race Sanders is also able to have more say over the party's agenda, and the power to pull Clinton to the left.
"We just won Kentucky! Thanks to everyone who turned out. We're always stronger united," Clinton tweeted.
Meanwhile, Sanders said: "This is the beginning of the final push to win California … We are in it until the last ballot is cast. No one can predict the future, but I think we have a real shot to win primaries in a number of the states coming up. Don’t tell Secretary Clinton – I think she might get nervous – but I think we can win here in California."
On the Republican side Trump easily won in Oregon – though he is the only candidate left in the race.
In other developments, the UK government is said to be preparing for a diplomatic trip by Trump, according to the Guardian, as presidential candidates typically go abroad during the campaign to boast of their foreign policy credentials.
That could be fairly awkward given the showdowns between Trump and Prime Minister David Cameron, as well as Mayor of London Sadiq Khan.