President Donald Trump has slammed 'disgusting and foul-mouthed' ex aide Omarosa Manigault Newman who he says was 'despised by everyone' in a series of scathing tweets, posted Saturday morning.

The president fired off a series of tweets taking aim at a host of former White House staffers for 'violating their confidentiality agreements'.

He posted: '...Yes, I am currently suing various people for violating their confidentiality agreements. Disgusting and foul mouthed Omarosa is one. 

'I gave her every break, despite the fact that she was despised by everyone, and she went for some cheap money from a book. Numerous others also!'

Trump accuses Omarosa of violating a 2016 confidentiality agreement with her tell-all book 'Unhinged', in which she was fiercely critical of him.