Has a nuclear bomb been used in the recent 20 years

Your answer is no, and hopefully no time soon

There have been nuclear "tests" which North Korea claims to have conducted, which if true, would make them the 8th country to do so.

The electoral college consists of 538 electors. a majority of 270 electoral votes is required to elect  the president. your state's entitled allotment of electors equals the number of members in its congressional delegation: one for each member in the house of representatives plus two for yoursenators.congress does the electoral college represent