Im not giong to lie to you, based on my experience of almost 80% of my schoolmates and from friends from other schools. Those that take both History AND politics are most likely going to drop one by the end of AS based on the new spec.
Its alot harder and since your taking on the new spec, some people begin to feel the pressure as its a one chance thing.
And to do history and polics; its sometimes not as important in some universities to actually do both at Alevels. depends on the university.
i pray you do well at AS but just be aware.
*watch this space in 1 years time.x