The Euro and the eurozone (and the countries represent by) are related, along with its monetary policies. Similar to the USD (the dollar) - US is part of the name.

The elected president is on the quite right side of the spectrum, so associating with any left wing policies/countries would be very unlikely, given Argentina's currency dropped massively during the last years. He won vs a candidate who used to be a financial minister overseeing several hundreds percent inflation.