A hundred thousand protesters in the Ukrainian capitol on Sunday.
By any measure a large crowd.
But opposition leaders are worried.
After five weeks of mass anti-government protests, momentum is waning.
200,000 showed up to last weekend's rally.
Now, the major opposition parties are consolidating their power into one bloc.
They're calling it "Maidan" after this central square where protests have taken place.
(SOUNDBITE)(Ukrainian) LEADER OF OPPOSITION UDAR PARTY, VITALIY KLITCHKO, SAYING:
"They think we will go home, they think that it will dissolve by itself in a short time. It will not dissolve itself, it will never dissolve, because we understand we must make reforms, and the only way to do that is to change the government. Yes?"
Protests that began over the direction of economic ties have morphed into something bigger.
An all-out demand for President Vicktor Yanukovich to step down, and early elections.
Not everyone