Shares of the Dow component fell 3.3% in pre-market trading.
Trump has said the US will impose tariffs on European car imports if it is unable to reach a trade deal with the European Union.
US industry bellwethers, Caterpillar and Nvidia, blamed slowing Chinese demand for disappointing results.
Shares of Caterpillar and Nvidia join a growing list of companies warning about the crippling effects of the fall-off in growth in China.
The Indian Council of Agricultural Research said the fall armyworm or Spodoptera frugiperda has been found on more than 70% of maize crops in Chikkaballapur of southern Karnataka state.
The research suggested thousands of people had lost their land in the past 15 years, while hundreds may have died each year in landslides and flooding linked to the mines.
Having been accidentally brought in from South America two years ago, the fall armyworm has since done tremendous damage to Africa's corn crop.
The infestation threatens what so far has been a promising April-to-September mid-crop.
The audience is Caterpillar's local network of dealers, who inspect the machines for the latest technological innovations to help make their sales pitches to buyers in China.
Ini kerana kedua-dua jenama itu paling kerap digunakan regim Israel untuk merobohkan rumah penduduk Palestin.