Inflationary pressures have been very low. Unemployment was high. Wages were stagnant. Now that the economy is taking off again, the low unemployment rate has caused companies to raise wages to attract people. That can lead to an increase in inflation if the Fed doesn't act to control it.
This had never been done.
Perhaps because we had not seen the economy tank the way it did under Obama? Not since the great depression?
The Fed is political.
Of course it is.