Some of Hillary Clinton’s more optimistic supporters believe that Barack Obama’s wave crested on Tuesday when they drew even honours in the mega-primary. But “Obamamania” could well resume as early as Saturday night when the results of the next three contests are declared (in Nebraska, Washington State and Louisiana).

Likewise at least two of the three “Potomac primaries” next Tuesday – Maryland and Washington DC – are slated to go in his favour. Not to mention the money race, in which Mr Obama’s prowess at internet-based fundraising is putting Hillary Clinton – and previous records – increasingly into the shade. In January alone Mr Obama raised $32m, more than double the amount raised by Mrs Clinton. His advisers suggest that he is on track to match that fundraising record again this month.