Businessman Donald Trump and comedian Russell Brand engaged in a nasty Twitter spat on The digital fight started when Trump tweeted that the Forgetting Sarah Marshall star is a 'major loser.' Trump's comments came three days after Brand appeared on 'Late Show with David Letterman' on Monday. Brand is not scheduled as a guest this week on 'The Tonight Show Starring Jimmy Fallon'.Thursday.Included in that tweet was a link to an excerpt from 'The Self-Made Myth:
