From NY Times: Unexpectedly bad data leaves Europe with little margin for error as Brexit takes effect and the coronavirus looms.
From Reuters: French economy shrinks in fourth quarter as strikes bite.
Italy’s economy has also been struggling.
Additionally it could be a big issue if Trump turns his eyes to Europe. Currently the US has a 2.5% tariff on cars imported from Europe. If Trump moved that to match the 10% tariff Europe charges on cars imported from the US, that would devastate the German economy.