1 In a twin pregnancy. the average is 37 weeks. for triplets 34 and quadruplets 32 weeks. 2  The average birth weight for singletons is 7 lbs 7 oz. 3  Average birth weight of twins is 5 lbs 5 oz. for triplets 4lbs and quads 3lbs. 4  A difference in birth weight between multiples is not unusual.
So, sometime between the 1860s and 1936, the (Democratic) party of small government became the party of big government, and the (Republican) party of big government became rhetorically committed to curbing federal power.
If you want to understand how destructive the 2010 and 2014 midterm elections were to the long-term downballot prospects of the Democratic party, all you need to do is look at this chart via Pew's terrific Fact Tank site. In 2009, Republicans controlled both chambers in just 14 state legislatures. Six years later, they had total control in more than double that number. And that's not even the full, bad story for Democrats. Look at their numbers. In 2009, Democrats had full control in 27 state legislatures; by 2015 that number was down to 11, the lowest ebb for total Democratic control since, at least, 1978.