No.Southern Michigan is about 43° north of the equator, while northern Argentina is only about 20° south of the equator. Argentina extends as far south as 55° S latitude, the southern tip of South America.
Northern Argentina is closer to the equator than southern Argentina is.
Northern Argentina is closer (about 1500 miles or 2400 kilometers south of the equator). Argentina (and most of South America) is south of the equator, so northern Argentina is closer to the equator than southern Argentina. (Argentina extends from about 22°S to about 55°S latitude.)
Like most of the US, Michigan is closer to Spain than to Argentina.(Some southern locations of the US are closer to Argentina.)
The northern half of Argentina is closer to the equator than the southernmost point in Spain.
Argentina
You are closer to the equator in northern Argentina than in southern Spain. Northern Argentina is located at a latitude of about 20°S, while southern Spain is at approximately 37°N. This significant difference in latitude means that northern Argentina is much closer to the equator.
It's possible to get closer to the equator by going north through Argentina than by going south through Spain, but I am not in either of those places.
People in most of Argentina are closer to the equator than people in southern Spain. Spain is between 37 and 43 degrees north of the equator. Only 20% of Argentina is more than 37 degrees south of the equator.
Tanzania is closer to the equator.
Sri Lanka is closer to the equator than China.
Egypt is about 3,000 kilometers closer to Australia than Argentina.