Behind Vice President Kamala Harris’ persona as “Momala” are her two stepchildren: Cole and Ella Emhoff. And the two of them are increasingly stepping into the limelight.

The youngest members of the second family, Cole, 29, and Ella, 25, are the children of second gentleman Doug Emhoff, who was previously married to film producer Kerstin Emhoff.

On Tuesday night, Cole Emhoff introduced his father for night two of the Democratic National Convention, presenting a heartfelt video…