Is Donald Trump's presidency becoming ... normal?

Ironically, by raising questions about Trump’s basic mental fitness the book has also encouraged some in the media to lower the bar for Trump. At a meeting with congressional negotiators on immigration, for example, Trump was clearly unfamiliar with the details of his own position on proposed legislation. But, since expectations were so low that reviewers passed over his ignorance and praised him for his coherence.

Here is the problem with that: You don’t have to think that Trump is crazy or suffering from pre-dementia to recognize him as a dishonest, erratic, narcissist who is demeaning the presidency and potentially rendering conservatism toxic for a generation. Brooks quite rightly warns mindless oppositionalism, lowering our intellectual and journalistic standards.

But to regard Trump’s presidency as normal, or something approaching normal, conservatives would have to ignore:…