Apex domains cannot have CNAME records.
Question and response
Question
dig chgov.org. NS
Answer
chgov.org. 2 NS ns-1702.awsdns-20.co.uk.
chgov.org. 2 NS ns-672.awsdns-20.net.
chgov.org. 2 NS ns-221.awsdns-27.com.
chgov.org. 2 NS ns-759.awsdns-30.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0