Students from around the state, some of them Parkland school shooting survivors, came by the busload Wednesday to protest a bill scheduled for a House floor vote to train and arm teachers with guns.

But an hour before they arrived at the Capitol, the House leadership pulled the school safety bill off the agenda as well as an equally controversial school voucher bill.

That didn’t stop the students and their allies from forming a gauntlet on the fourth floor lobby that lawmakers walk through to get to the double doors leading into the House chambers.

Some House members chose to enter through the back rather than confront the students holding photos of victims of gun violence – including the face of Maura Binkley, who was shot in a Tallahassee yoga studio in November.

About 150 students came by bus, and were joined by local high school students. They credited themselves for the postponement of the bill to expand the Guardian program to allow teachers to carry guns on campus.

“It shows the power young people have and their influence on the legislative process,” said Robert Schentrup, a survivor of last year’s Valentine’s Day shooting at Marjory Stoneman Douglas High School.

“This bill directly impacts us as young people and high school students and it affects our daily lives,” said Schentrup, whose sister was among the 17 students and staff members killed in the massacre.

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House officials said the bills were postponed for two reasons — a large number of amendments by Democrats seeking to force a floor debate, and negotiations between the House and Senate on points where they sharply disagree.

“They are in for a bumpy delivery to the Senate because of all the amendments,” House Minority Policy Director Evan Jenne said.

Legislative insiders predicted the delays could be a harbinger of an extended or busted session.

House Democrats filed 67 amendments on both school bills. They were by design meant to start a conversation, and force lawmakers to explain where money would come from to pay for guns and training for teachers, among other things, minority leaders said.

House Speaker Jose Oliva, R-Miami Lakes, said he agreed to hold the bills at the request of Senate leadership.

"It was something they wanted to pursue, to hold these bills and act in good faith and have budget conversations and make legislation that would match up with that budget."

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The amendments get to the heart of the budget negotiations that would be laid bare during debate, another insider said.

Democrats are being forced to take the tack because the Republicans have shut down committee debate among members and restricted public comment, said Nicolette Springer, the League of Women Voters legislative administrator.

“These bills are not getting properly vetted, forcing multiple amendments on issues that could have been hashed out in committee,” Springer said.

Lawmakers are acutely aware of the students outside the chamber, said Scott McCoy, senior policy counsel for the Southern Poverty Law Center.

“They’re beginning to hear the kids, the teachers, the experts, the sheriffs who don’t think we should be putting more guns in the classroom,” McCoy said. “The voucher bill has significant constitutional problems, taking general fund money and sending it to private and parochial schools.”

Contact Schweers at jschweers@gannett.com. Follow him on Twitter @jeffschweers.