Ramaphosa’s letter to Trump was a failure

• US Ambassador Leo Brent Bozell III said President Donald Trump's letter to Ramaphosa was a failure
• Relations between the US and South Africa have deteriorated since Trump returned to office last year, with the US expelling the South African Ambassador and revoking the visa of a former foreign minister
• Ramaphosa's government has said its policies aim to improve the economic lot of South Africa's Black majority, who were marginalised under apartheid