The president also threatened to hit Mexico with an extra 5% tariff in a row over water supplies to US farmers.

Leaders on both sides of the border have faced pressure from farmers and ranchers to secure more water for their farms.

The president also threatened to hit Mexico with an extra 5% tariff in a row over water supplies to US farmers.

"At the end of the day, the farmers, they just want to conduct business, not necessarily have to get these packages," one agricultural economist said.

Trump says funds will be made available from tariff revenues and promises trade policies will make US farmers 'strong’.

Top lawmakers signaled that more federal help to farmers could be on the way, which could help tractor sales.