Only if Russian law would somehow exclude the notion of force majeure (which it does not) or Russian courts would decide to make political decisions (which they definitely could and routinely do). In the latter case, American companies would have to seriously think if the profitability of the business in Russia is enough to warrant the enforcement risks due to political courts.
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In some sense. If you wanted to get the government to enforce the contract, they wouldn't, so there you go, paid off.
The Russian government will enforce a contract made in Russia.
Only if Russian law would somehow exclude the notion of force majeure (which it does not) or Russian courts would decide to make political decisions (which they definitely could and routinely do). In the latter case, American companies would have to seriously think if the profitability of the business in Russia is enough to warrant the enforcement risks due to political courts.