The link you sent is not factual, it is an opinion piece and full of inaccuracies.

True, not all billionaires support the GOP, some support Democrats.  But a few exceptions to a rule does not negate the overall truth of the rule.

Look at the actual GOP agenda, not the spin masters.  The first thing George W. did was to give giant tax breaks to the 1% and dismantle social programs for the 99%.  Trump tried to eliminate the Affordable Care Act to take away health care from 20 million Americans to give a huge tax break to the 1%.  All GOP legislators went along, except for three, and all Democrats voted against this.  These are just two examples of so many instances of GOP siding with the 1% against the 99%.

By the way, your link incorrectly names many Republican contributors as Democrats such as Sheldon Adelson, Robson Walton, Alice Walton, and Lawrence Ellison,  (who supported Marco Rubio’ in 2016).

Again, look at what the GOP actually does and attempts to do, not at their spin.