The AP reports:

John McCain effectively sealed the Republican presidential nomination on Thursday as chief rival Mitt Romney suspended his faltering presidential campaign.

"If I fight on in my campaign, all the way to the convention, I would forestall the launch of a national campaign and make it more likely that Senator Clinton or Obama would win. And in this time of war, I simply cannot let my campaign, be a part of aiding a surrender to terror," Romney will say at the Conservative Political Action Conference in Washington....

Thanks to InstaPundit for the pointer.

UPDATE: I should note that I think Romney's "aiding a surrender to terror" line is quite over-the-top; whatever Clinton's and Obama's possible faults may be, they surely aren't planning to "surrender to terror" or do anything close. (Even promptly withdrawing troops from Iraq, something I don't agree with, can't be fairly described as that.) I didn't focus on that sentence when I first posted it -- I just copied and pasted what struck me as an important news item -- or else I'd have noted this at the outset.