Apex domains cannot have CNAME records.
Question and response
Question
dig iowacitysos.org. NS
Answer
iowacitysos.org. 4 NS ns-948.awsdns-54.net.
iowacitysos.org. 4 NS ns-2040.awsdns-63.co.uk.
iowacitysos.org. 4 NS ns-336.awsdns-42.com.
iowacitysos.org. 4 NS ns-1148.awsdns-15.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0