Hey, being a bitch is a hard trait to turn off.
It worked for Thatcher.
Kind of a similar situation with early 80's England: A Labour torned apart by inner fights and poor leadership lost the credibility with the voters. And Thatcher and Tories just had to cash in on that.
Current situation in USA: A weak GOP, with lots of internal problems, has a big uphill struggle.
And IMO, it's the Republicans who will lose this Presidential election. Not the Democrats who will win it because their great politics.
Whether or not the Democrats will be able to convert it all into something, is a different matter.
Thatcher was able to stay in power for a long time, and had a lot of impact on UK with her politics.
Whether or not that politics were good, is debatable. But she was able to get the mandate to do things in the UK.