Boeing 737-700 (01-0040)

Is this the kind of craft that would be used to transport cabinet staff? Like a government fleet vehicle?

yes--maybe even used as Force 2--for the US VP
was type of aircraft sent to AZ to bring Sen McCain's remains to DC for lay in state in Capital Rotunda 8/31

The one used to bring the late senator was the one authorized be president Trump. It's normally the one used to transport the VP and is a C-32 (B757). This one is a C-40B (B737) used for the transport of various high-level U.S. military and government officials.

Easy way to remember. The bigger the aircraft the more important you are.

The unit that operates all of these blue and white SAMs is the 89th Airlift Wing, 89th Operations Group, at Andrews Air Force Base, Maryland.