Since Trump won the election, his can hardly be considered a losing strategy.
Trump won. You lost. I lost. We all lost.
With the "help" of everyone who supported Trump. And by support I mean voted for. That so many supported Trump, while recognizing that, but simply fearing they would somehow lose worse with Hillary, is the problem here. We all would have lost with Hillary as well.
Don't confuse a winning electoral strategy with a winning governing strategy that is successful in improving the human condition, or, even maintaining the status quo.