Donald Trump and Republicans are seeking to shore up support in agricultural states facing tight Senate races as rising costs squeeze farmers. (File pic)PARK CITY: President Donald Trump said on Monday the US Department of Agriculture will launch what he called a new "harvest fuel relief program" that will provide farmers with US$8 billion in support to offset diesel costs during the harvest season.

"Tonight, I'm also pleased to announce that the Department of Agriculture will be launching a new harvest fuel relief program, providing our farmers with US$8 billion in support to offset diesel costs during this harvest season," Trump said in a midterm election campaign speech in Kansas.

The announcement was the latest in ⁠a series of financial promises and pledges that the Republican leader has made to voters ​heading into the November midterm elections, where control of Congress is at stake.