It was a big weekend for Illinois Sen. Barack Obama and former Arkansas Gov. Mike Huckabee.
Both presidential candidates scored victories in primaries and caucuses across the country.
Watch for more from CBN News top poltiical reporter David Brody, following this report.
Both of them hope to keep their momentum going in the upcoming primaries, while Sen. Hillary Clinton made a major change in her campaign.
Voters in Maine, Nebraska, Louisiana and Washington state have given Obama momentum as he challenges rival Hillary Clinton in Tuesday's Potomac primaries.
"So given the challenges we face we cannot afford to wait. We can't wait to fix our healthcare system. We can't wait fix our schools," Obama told a cheering crowd.
But Senator Clinton still holds a slight lead in the overall delegate count. 1,136 to Obama's 1,108.
After the series of weekend losses, Clinton replaced her campaign manager with long-time friend and former White House aide Maggie Williams.
And, as her lead shrinks, Clinton is casting herself as the candidate to take on the Republican nominee.
"We also have to ask, who can win? Who can go the distance? I want you to think about this," Hillary Clinton said.
On the Republican side, Huckabee won caucuses in Kansas and Louisiana, but is contesting the results in Washington state, declared a narrow win for John McCain.
Huckabee - who acknowledges his chances are slim - vows to stay in it until a Republican secures the 1,191 delegates needed for the nomination.
As they stand now, Huckabee trails, with 234 to McCain's 719.
"People say the path to victory is very complicated. And boy, they're right. The path to defeat is really simple. All I've got to do is walk off the field," Huckabee said on CBS' Face The Nation.
Although he is the GOP frontrunner, McCain has trouble winning support among the conservative base of his party.
In an interview with Fox News, President Bush defended McCain's conservative credentials on issues ranging from strong on national defense to taxes and his stance as a pro-life candidate.
"If John is the nominee, he's got some convincing to do to convince people that he is a solid conservative. And I'll be glad to help him," President Bush told Fox News Sunday.
Although there are five more February contests, including tomorrow's "Chesapeake Primary" in Washington D.C., Virginia and Maryland - the candidates are looking toward the delegate-rich states of Ohio and Texas - which could provide them with the edge they need to go on.