Euro is far, also Euro is far more left leaning (I guess) than the US (even democrats in the US would be considered right form the center in Europe). But the real issue would be the lack of currency reserves - least I'd think Argentina might have more Dollar notes than Euro ones.
I don't know how this helps, though.
Argentina's peso ("left-leaning fact-based" currency) went from worth 0.35 US dollars to now 0.0029 US dollars in less than 5 years.
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.
Technically, from a geography point of view, euro-using countries as official currency are closer than USD: https://eur-lex.europa.eu/EN/legal-content/glossary/outermos...
(I.e. French guiana's currency is the Euro)
The distance - far/close matters when it comes to the trading partners more than anything. The US and Brazil being the biggest ones[0], and the trade is in USD.
[0] https://www.indec.gob.ar/uploads/informesdeprensa/i_argent_0...
That used to be the case but it is true no longer, current 'Democrats' (between quotes because the DNC seems to be as democratic as the DRC from what I've seen) are comparable to centre-left parties in north-western Europe. The more activist wing of the 'Democrats' is comparable to socialist and communist parties in e.g. Sweden and the Netherlands.