Elections. The votes of the people in the State to which they seek to represent.
The 17th Amendment gave voters the right to elect senators
His office is in Pennsylvania.
Senators can be in office for how ever long they are elected for but the election for new senators is every 6 years.
6 years
The people " the voters"!!
the senate
Senators do not have "terms". They are allowed to be in office for life/during good behavior.
There are 24 Senators but currently only 23 Senators.
Canadian senators are appointed by the Prime Minister, they are not elected (although there are plans to reform the Senate).
100 http://www.senate.gov
(in the US) 6 years.
For life!