The spreadsheet counting his donors was too large: A milestone of sorts was reached earlier this year, when Obama, the Illinois senator whose revolutionary online fundraising has overwhelmed Clinton, filed an electronic fundraising report so large it could not be processed by popular basic spreadsheet applications like Microsoft Excel 2003 and Lotus 1-2-3. Those programs canât download data files with more than 65,536 rows or 256 columns. Clinton got there eventually. By March, the reports