There are some similarities but I don't think we have quite reached the point where say a PM Farage was likely.
For all their faults Blair/New Labour were necessary to finally get the Conservatives out of power. I think we are generally a small c conservative country but the political cycle...
Not buying this 'brilliant conman' line, he's certainly no T Blair. He seems utterly transparent, narcissistic, vengeful plus not blessed with great intellectual capacity/oratory skills.
More a sad reflection of the state of the US political system that such a person could succeed.