Has there ever been a corporate or citizen's welfare program that has not been dropped as soon as the political tides turn in the US
Absolutely. Oil subsidies and tax breaks have persisted for decades through Democratic and Republican administrations. Same for tobacco subsidies, sugar subsidies, corn ethanol subsidies, etc. The mohair subsidy persisted for more than 70 years after it became completely pointless in 1945. The carried interest tax break for investment bankers famously just survived in Trump's big tax reform, despite his repeated promises during the campaign to eliminate it.
I could go on, and on, and on.
It is much harder to find the opposite: An example of corporate welfare that was actually ended.