A senator does not have to be democrat he or she can be of whatever party he or she wants.
There are currently 57 Democratic Senators.
As of July 2013, there are 52 Democratic Senators and 2 Independents that caucus with the Democrats.
yes both of them were
51 Democrat, 47 Republican, 2 independent (they vote with the Democrats)
As of 2010, there are 100 Senators in the US Congress.
Both are Democrats.
Since 2006 49 are democrats 49 are republican 2 are independents
Senators Clinton and Obama.
Frank Lautenberg and Bob Menendez. Both are Democrats.
Both senators are democrats.
As of the 2012 election, there are 53 Democratic Senators, plus 2 independents who caucus with the Democrats. There are 45 Republicans.
Russ Feingold and Herb Kohl, both Democrats.