"We think this vote will reflect in no uncertain terms the taxpayers' overwhelming support for our plan, which will turn this city's liability into a massive city asset with no taxpayer dollars", Stone said at a Tuesday news conference.
City voters approved Prop 1-a half-cent sales tax hike to expand MetroLink-but rejected Prop 2, which would have raised money for the construction of a soccer stadium downtown near Union Station.
Proposition 1 passed easily, garnering 60 percent of the vote, but Proposition 2 could not get the necessary support from voters in the city despite stadium advocates spending $1 million in support of the St. Louis stadium vote, according to the St. Louis Post-Dispatch.
St. Louis' professional soccer hopes may have died Tuesday. St. Louis was a favorite to land a Major League Soccer expansion team for play starting in 2020 - but only with voter approval.
SCSTL said there is no Plan B to bring an MLS team to St. Louis.
Dan Courtemanche, Major League Soccer's executive vice president of communications, released a statement via Twitter.
The group proposed the development shortly after the NFL's Chargers announced they were relocating to the Los Angeles area. "In light of the mayor's announcement yesterday of a special election in November of this year, we are requesting that the City Council place our proposal on the same ballot and allow the citizens of San Diego - who own the Qualcomm Stadium property - to have the final say on what will become of this special site".
SC STL chairman Paul Edgerly said people "worked hard" and that the group was "disappointed for St. Louis".