Who is the current congresswoman for Delaware?

The correct answer is Lisa Blunt-Rochester, who is the current congresswoman representing Delaware. Lisa Blunt-Rochester has been serving as the U.S. Representative for Delaware’s at-large congressional district since 2017. She is notable for being the first woman and the first African American to hold this position in Delaware's history.

In the context of the other individuals listed, they do not serve as congresswomen for Delaware. Lisa Murkowski is a senator from Alaska, Kamala Harris is the Vice President of the United States, and Elizabeth Warren is a senator from Massachusetts. Each of these figures represents different states and holds different political roles than that of a congresswoman for Delaware. This highlights why Lisa Blunt-Rochester is the correct answer for the question about Delaware's representation in Congress.