medicaid, mr. ryan would slash the government, including defense, to 3.75% of g.d.p. by 2050. defense alone is 4.6% today. according to c.b.o., the total has never been below 8% since world war ii and defense has never been below 3%. so mr. ryan would either have to make massive defense cuts, the very same defense cuts he decried on the campaign trail yesterday, or he would need to virtually elimi