This is a combination of Neocon colonial handlers promising to please Trump through every imaginable increase in warmongering submission to keep war ongoing, and deeply misplaced optimism that Trump's pro US oligarchy/monopoly profits will help economic growth instead of just the stock market.

Technically, high cost of living increases from tariffs and deportations can be "nominal economic growth". Insurance costs will keep skyrocketing from high replacement costs of homes and autos, and pessimism over global warming. If US massively increases government spending, the growth forecast is possible, but then so is collapse and debt default.

The growth forecasts will be accurate if colonial subjugation increases even more, but EU leaders during Trump45 had more backbone as a result of his disrespect. Everything is extremely uncertain, but there is more likely to be a US led global recession than anything else.