not really... if it were that easy it would’ve been found out long before...
I forgot that CC companies probably do exchange rates real time, so you can’t get a “Euro Vs Dollar historical table” and cross-reference it.
The best I’m doing is getting numbers kinda close, but no real overall pattern. For example, my Euro-converted 24.95 *might* be more likely to have been paid in Euros than the actual $39.17 amount, but who can say for sure...
Anyone can download the sub-200 amount here:
http://www.fec.gov/DisclosureSearch/MapAppDownload.do?cand_id=P80003338&cand_nm_title=Obama,%20Barack&downloadComeFrom=mapApp
From a statistical/anecdotal standpoint, it would be interesting to know whether the # of odd-amount contributions is much, much higher for one campaign, or pretty even for both.