FROM CNN's Jack Cafferty:
Two weeks ago – nobody estimated the size of the story that was unfolding in Cairo. And I'm not sure anybody still does.
It's entirely possible that what we've been seeing on our TV screens for the last two weeks could reach far beyond the borders of Egypt.
There are already rumblings across the Middle East that something much larger is happening.
If and when Mubarak steps down - he'll be following Tunisia's president, who was pushed out of power last month after similar popular uprisings.
Yemen's president has said he won't seek re-election when his term is up - and that he won't hand power over to his son.
And, after calls for reform - Jordan's King Abdullah sacked his whole government and appointed a new prime minister.
Meanwhile - protests, facilitated by technology like Facebook and Twitter, have sprung up everywhere from Algeria to Sudan and Syria.
It seems that after decades of repression in some of these countries... the people are finally being heard.
Earlier this week, U.S. Defense Secretary Robert Gates was asked about a possible domino effect in the region. He described what's happened in Tunisia and Egypt as a "spontaneous manifestation of discontent" coming from people who have both political and economic complaints about their governments.
Gates says he hopes that other leaders in the region take note of what's going on in Egypt and Tunisia and start addressing their citizens' concerns.
My guess is they may not have much of a choice.
Here’s my question to you: What signal would Mubarak's resignation send to other Middle Eastern countries?