When was the first election that Washington , D. C. was granted electoral votes

The first presidential election in which the District of Columbia participated was the election of 1964.

lincoln declared that slavery should not be allowed to spread into the new states, and of course this angered the south at the time.

the virginia plan called for three branches of government and two houses of congress. representation in each house would be determined by population. the new jersey plan called for three branches of government and a single house of congress. each state would have an equal vote.