...the rate of growth has been around 100,000 per day over the past several days.  It may slow down because it's a weekend, but about 30,000 new donors have been tabulated over the past 13 hours (including overnight hours across the United States).

A slowdown from the past week's activity may mean the counter will not hit two million before midnight tonight.  But 70,000 in a day is not only possible, it's actually lower than what has been achieved this week.