The Federal tax credits for plug-in cars, for example, are available to all automakers (or more accurately, the customers of all automakers). You could start an electric car company today and your customers would be eligible for the credit. Nissan Motor Co. is the #1 beneficiary of the tax credits to date.
All automakers were eligible for the DOE's ATVM loan program. Tesla received (and paid back) about $500 million under the auspices of the program. Ford received $5.9 billion and Nissan received $1.4 billion. Neither Ford nor Nissan have paid back the loan.
The Federal government bailed out GM and Chrysler to the tune of about $20 billion.
We've spent trillions of dollars to secure our interests in the middle east, which keeps oil supplies stable to the benefit of ICE automakers.
People always complain about government subsidies when there are articles about Elon Musk, but it is hardly ever even-handed.