Are you using the B. Clinton dictionary?
There are plenty of companies that finance protectionism because they profit from anti-capitalist practices. The sugar industry in the USA is a leading example - they find it's better to play politics than actually compete with the rest of the world. It's not so cut and dried that companies or financiers are in favour of capitalism. Not just protectionist losers scream for mummy government to protect them.
Setting intelligent policy, however, requires realising that capitalism provides the best consumer choice, and thus putting forward those policies which bolster it.
Ivan