The chart above depicts the percent of contributions in U.S. Dollars donated to Republican and Democrat candidates/parties/affiliated groups, seeking national office during the 2020 election cycle, donated by employees, or owners, of the companies listed, and those individuals' immediate family members, based on data collected from www.opensecrets.org.
In some instances the money was possibly donated by the actual company, but the bulk of it typically comes from individuals within the company, or immediate family members of individuals within the company. The only way I'm discussing the actual organization is if I reference it as "the organization itself", otherwise, I'm talking about the jargon mentioned above (individuals within the company, owners, employees, direct family, etc.). In some instances, the money considered contributed may come from PACs affiliated with the mentioned organization.
Let's start by taking a quick look at what each wholesale retailer charges (as of September 14, 2021) for their low/high membership fees. Sam's charges $45/100, Costco charges $60/$120, and BJ's is $55/$110.
Finally, Democrats on the Left, Republicans on the Right!
Sam's* $2,526,582 $2,447,632
Costco $1,456,738 $309,138
BJ's** $402,623 $338,489
Totals $4,385,943 $3,095,259
The wholesale retailers listed above donated a combined $7,481,202, to 2020 political campaigns. 59% of which (equaling $4,385,943) went to candidates (or entities associated with) Democrats.
*BJ's is owned by CVC Capital Partners and Leonard Green & Partners, so I combined donations from both of those entities, and that's how I came up with the number above for BJ's.
**Sam's is owned by Walmart.
Special Thanks to https://charts.livegap.com for the website used to make the chart above.