There are a number of non-financial motives in the USA to keep the interest rates artificially low. The election is the primary one. The incumbent President will find it supportive to ensure that the large cap indexes high and the debt payments of the public manageable, at least to past the election date.
Also should the trade war with China continue to sap the world economies, there will be a race to the bottom for the currencies.
i don't think this picture of the DXY
is too far exaggerated under the current circumstances, and if nothing changes.