flip-flop - the Americans do care.....
they are our biggest creditor when you take sovereign and commercial debt into account. This is what underwrites our credit rating viz the French, not only the US banking sums due but also the impact of the City in terms of commercial loans. Plus the difference being that we have a central bank that can shuffle the economic cards accordingly, whereas the French are dependent on the EU as a whole.
For a better understanding of this, the following graphic tool is excellent, though there is one flaw, the Chinese are not included.
http://www.bbc.co.uk/news/business-15748696