<span>Mindaugas was the first "grand duke" or president he was later killed by his nephew</span>
The legislative branch creates laws. Congress is in this branch.
If you are asking about the first president of the United States, the answer is George Washington.
It affected his ideas because he felt that the cabinet should be made a specific way which determined his outlook on the presidency
There will be cold wars, as political tension is really high between the two