By Andrew Gamble The PGA Tour has been dealt a financial blow immediately after Jon Rahm ‘s sensational switch to LIV Golf after Wells Fargo’s decision to end its long-standing sponsorship of the tour’s annual event in North Carolina. On Thursday, Rahm became the latest star to jump ship from the PGA Tour for LIV Golf, the rival tour backed by Saudi Arabia’s Public Investment Fund. The Spanish golfer agreed a deal that could be worth up to a whopping £450 million, marking perhaps the biggest win for the circuit since it burst onto the scene as a competitor to the PGA Tour. After weeks of whisp…