Big night for two candidates in Ohio and Texas

Primary wins Tuesday in showdown states Ohio and Texas may have broken Barack Obama's momentum, but it remains to be seen if Hillary Clinton can over come the math.

She's put a dent in his delegate lead, but since the votes were close and the delegates are awarded proportionally, last night's results don't turn this race upside down.

As if to underscore this point, Obama turned his speech away from his rival to draw a contrast with John McCain.

"He has seen where George Bush has taken our country and he promises to keep us on the very same course," Obama said Tuesday night.

Still, momentum is important and Clinton's big night should help stop some of the powerful super-delegates from jumping ship. But more than anything, the swing suggests Democrats aren't yet ready to anoint anyone.

The democratic tug-of-war looks destined to go to the distance, but John McCain's already hit his magic number.  "I will be the Republican nominee for President of the United States!" He said in front of a crowd after his wins Tuesday night.

The Arizona Senator's clean sweep puts him over the top in delegates which now allows him to look a head to November.  He does have some challenges however.  His largely bare-bones campaign lags far behind the Democrats in fund-raising and organization, and he must ramp it up for the general election.

McCain will be working on shoring up his own party's support today with a visit to the White House.  It's expected he'll get President Bush's endorsement.