Massive, thunderous protest in Wisco double yesterday's

An estimated 16,000 protesters are right now marching, singing, cheering, tweeting and chanting inside and outside the Wisconsin Statehouse in a powerful show of opposition to Gov. Scott Walker's insane budget bill. The bill is being heard in a committee room where the thunderous roar of the crowd can be heard outside. The video above is just a taste of what's happening now. Link to this video here to get a better sense of the size and energy of this crowd.

We're following day two of the amazing protests in Wisconsin via twitter. We learned that inside the Rotunda, high school students led the crowd in the National Anthem.

Following that, according to a Twitter feed:

OFA_WI "This land was made for you and me" the crowd sings with an impromptu band of banjos and drums inside the capitol.#killthebill #wiunion

Outside, the crowd is enormous, estimated at 25,000, nearly double yesterday's. AFSCME President Gerald McEntee gave a rousing speech, followed by the crowd singing "We're not gonna take it." Firefighters, who are exempt from the budget's union-busting provisions, draw huge cheers whenever they show up.

Here's what the protesters are saying on Twitter:

@JacquelynGill More firefighters! And the crowd goes wild. #wiunion http://plixi.com/p/77855808 #notmyWI

@evale 72  Local businesses offering 10% discounts to teachers! #solidarity #notmyWI http://twitpic.com/40hsxd

@SeleneMSC  Full hearing room. We can hear the thunderous roar of protesters in the rotunda! http://plixi.com/p/77879392 #notmyWI #WIunion

@KRISTINAKAY Egypt in Wisconsin USA Gov. Walker is unfair to 90% of Wis. Starting w/ teachers & #wiunion #notmywi Help us PlZ @cnnnow and @cnnlive

@SeleneMSC  Protesters, chanting, fill the rotunda. #notmyWI #WIunion http://plixi.com/p/77879857

@mahatmazombie  "Wisconsin Taken Over by Working People " - http://bit.ly/ezkMWZ #GovWalker #NotMyWI #SolidarityWI

@MNAFLCIO  Measure to weaken union rights for most Wis. public employees draws boos at Minn. union rally http://bit.ly/hrygJJ #mn1u #1u #notmywi

@MelissaRyan  The one thing I hope people not in Madison can comprehend is just how large the crowds are. Double yesterday's and growing. #notmyWI

@So Proud of my Sisters & Brothers on the Picket Lines & Barricades in #Egypt & #Wisconsin #notmyWI #SolidarityWI #WIgov #WIunion !!

@bluecheddar1 "JUST" a #Madison thing?NOPE. It's #WI: Fond du Lac Veterans Park tonight. 5:30 to 7 p.m. event http://ow.ly/3XJKy#solidarityWI #wiunion