Current U.S. Senators for the state of Delaware:
Delaware was ratified to the Union on December 7, 1787 and elects its U.S. senators to Class 1 and Class 2. Delaware's current U.S. senators are Democrats Tom Carper (serving since 2001) and Chris Coons (serving since 2010).
Source: Wikipedia
https://en.wikipedia.org/wiki/ListofU.S.statesbydateofadmissiontotheUnion
https://en.wikipedia.org/wiki/ListofUnitedStatessenatorsfromDelaware#LivingformerU.S.senatorsfrom_Delaware