In the 111th Congress both are Democratic Senators.
If you are asking wich political party is currently in the majority, and thus in control of the Senate - as of November 2011, it is the Democrat Party.
Democrats
Democrats
The political party with the greatest number of members in the Senate is referred to as the majority party.
Majority Party!
It is divided with the democrats holding a majority in the Senate and the republicans in charge of the Virginia House of Delegates.
Harry Reid is the Senate Majority Leader, he is a Democrat.
majority party
Republicans hold the State Senate with a 30 to 20 majority and the Democrats hold the House with a 104 to 99 majority.
Both the Washington State Senate and House have a Democratic majority.
There is one Majority Leader in the United States Senate. This position is held by the leader of the political party that holds the most seats in the Senate. As of September 2021, the Majority Leader is Chuck Schumer of the Democratic Party.