According to Nobel winning economisr, Joseph Stiglitz, higher rates would slow the US economy but it would hurt African-Americans and Hispanic Americans the most.
Source: Joseph Stiglitz: It’s a no-brainer to keep rates on hold – MarketWatch
Of course, since the financial crash of 2008, poor Americans have never really recovered. The top 1% and indeed the top 20% have gone from strength to strength. I’m not sure what Obama has really done to improve the lot of the least advantaged in American society?
Thoughts?
Dr Alf's Blog 
The short answer to Dr Alf’s question is that President Obama by inaction and stupid decisions has made the poor even poorer.
At some stage interest rates will have to rise because otherwise there is no incentive for anyone to save money.
That time is probably not yet.