How did the grandfather Claude prevent blacks from voting?

Until the Supreme Court struck it down in 1915, many states used the "grandfather clause " to keep descendents of slaves out of elections. The clause said you could not vote unless your grandfather had voted -- an impossibility for most people whose ancestors were slaves.

HOPE SO IT HELPS YOU

john f. kennedy purpose was to make his argument a strong appeal to emotion in order to make an impact and connection to american citizens. he want to achieve peace by telling the citizens they shouldn't be afraid of other nations.

explanation:

that would be the steamboat because none of the other things are forms of transportation