Next major contest:Clinton and Obama campaigners began arriving in Texas and Ohio yesterday to prepare for what is already being dubbed Super Tuesday II. Staff winding up headquarters and field offices in the 22 states that went to the polls on Tuesday were being diverted to Texas and Ohio, two of the most populous states in the country, which go to the polls on March 4th.
Texas has 193 delegates at stake plus a further 35 super-delegates (members of Congress and others who automatically are able to vote for the party nominee) and Ohio has 141 (with 20 super-delegates).
Two smaller New England states, Vermont and Rhode Island, also hold primaries that day.
A poll in Texas last Friday showed 48 per cent support for Mrs Clinton to 38 per cent for Mr Obama. In previous contests Mr Obama has been behind in polls and caught up, partly through good organisation on the ground.
The latest poll in Ohio, published by the Columbus Dispatch and carried out early last week, put Mrs Clinton ahead on 42 per cent to Mr Obama's 19 per cent and John Edwards, who has since dropped out, on 18 per cent.
But Mrs Clinton and Mr Obama have done the maths and no longer believe the outcome will be decided on Super Tuesday II and are bracing themselves for Super Tuesday III on April 22nd, when another populous state, Pennsylvania (158 elected delegates, 30 super-delegates) makes its decision.