American billionaire David Koch, a major donor to the Republican party, has died aged 79. He had been suffering from cancer, BBC reports.
The former majority owner of Koch Industries was ranked by Forbes below brother Charles as the 11th richest person in the world.
Together they had a huge influence on the conservative movement and bankrolled causes pushing for small government and a free economy.
But this has made them both polarising figures.
They gave a lot of money to Mitt Romney’s failed presidential campaign but fell out with President Donald Trump over his tough immigration policy and tariffs.
In 2018 Koch stepped down from Koch Industries – which refines crude oil, produces fertiliser, and manufactures household products – citing his declining health.
He had been a major donor to the arts, especially ballet, and donated to New York’s Lincoln Center and Memorial Sloan Kettering Cancer Center hospital.
He ran for vice-president as a Libertarian in 1980, calling for the abolishment of many federal government agencies.