One obstacle kennedy faced in his quest for presidency was his

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.

ok

explanation:

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.

we have pictures for proff

they also have books