All of the indicators are flashing bright red for an incoming recession and furthering this pointless one-upmanship will just further speed things along. He's already increasing the tariffs even further and eventually things are gonna crash.
The site fivethirtyeight.com has a page that shows approval polling of presidents since Truman overlaid with Trump. The only President significantly more unpopular than Trump at this point in their Presidency was Carter. The only Presidents who were roughly as unpopular at this point, were Obama and Reagan, oddly enough, both of whom of course were re-elected.
But I think those facts fail to capture what is unique about Trump's polling. Every President since Truman, excepting Trump, has had high points where they had well over 50% approval. Trump's polling is uniquely nearly flat since the beginning of his presidency. He's currently about 42% approve, 54% disapprove, and it's getting worse, but this is actually not the worst rating he's had - late 2017 was worse. In other words, there seems to be no trend.