Staring down the prospect of nominating Donald Trump for president, Republicans spiraled into a chaotic, last-ditch search Wednesday for a way to save the GOP from hitching its fortunes to an unpredictable celebrity candidate without alienating his throng of followers.

Sensing a window closing fast, GOP leaders and elder statesmen toggled through a menu of scenarios but landed on none. Some amplified calls to rally around a Trump alternative, even if that alternative is Ted Cruz, a prickly conservative with few friends in the party.

Others laid out still-hazy plans for a brokered national convention, an option likely to smack of the backroom dealing Trump fans despise. Some floated more extreme measures, talking of breaking from the party and starting anew.

"It's all a play to stall it or try to deny him the nomination," said Neil Newhouse, a GOP pollster. "And the problem with that is no one has the best scenario for how to do that."

The scrambling came as the billionaire candidate racked up commanding victories in seven of eleven Super Tuesday primary contests, and the path to victory for his rivals narrowed. Trump's strength -- which stretched from the Deep South to New England -- exposed the depths of the divisions within the party, no matter who becomes the nominee in this election.

As Republicans surveyed the wreckage from Trump's surge, some argued there was still a chance to stop him. He was not yet on track to claim the nomination before the party's national gathering in July, according to an Associated Press delegate count. He has won 46 percent of the delegates awarded so far, and he would have to increase that to 51 percent in the remaining primaries.

"Trump had a good night, but he left the door open," said David Winston, a Republican pollster.

The GOP mayhem contrasted sharply with a clearer picture on the Democratic side, where Hillary Clinton on Tuesday locked down solid victories in seven states and was on the path to regaining her status as the inevitable nominee. Rival Sen. Bernie Sanders vowed to keep up the fight, campaigning in Maine on Wednesday.

Sanders, a fierce opponent of big money in politics, quoted director and screenwriter Adam McKay, winner of this year's Oscar for "The Big Short" adapted screenplay, who warned about candidates who take major contributions from "weirdo billionaires."

Republicans, meanwhile, looked for a wise man to calm the jitters and point the way.

Mitt Romney, their nominee four years ago, suggested he might try to fill that role. The former Massachusetts governor announced plans to speak on the "state of the 2016 presidential race" Thursday in Utah. Romney has moved aggressively to take on Trump in recent days, saying the billionaire's unreleased tax returns might contain "bombshells." But he was not expected to endorse a candidate or announce a late entry into the race himself.

Some Republican officials have said they would not support a Trump nomination, including Massachusetts Gov. Charlie Baker and South Carolina Rep. Mark Sanford, but neither offered another alternative.

Former Texas Gov. Rick Perry has been approached by "a mixture of people" about being part of a third-party bid, said Jeff Miller, who managed Perry's failed GOP presidential campaign. But Miller said Perry found the idea "ludicrous."

The Associated Press has asked Republican governors and senators if they would support Trump if he becomes the party's nominee. Of the 59 respondents, slightly less than half could not commit to backing him in November.

While his party looked for ways to stop him, Trump was trying to soften hard feelings. House Speaker Paul Ryan's office said the Trump campaign had reached out but the two men had not connected. It noted the speaker also planned to be in touch with other candidates.

If there is a chance of derailing Trump, who did not campaign Wednesday, it increasingly appears to rest with Cruz. The Texas senator came in just 25 delegates behind Trump Tuesday night, although he faces less favorable contests as the race presses on.

Sen. Marco Rubio and Ohio Gov. John Kasich also hold out hope they could catch fire in upcoming contests. Each must each win his home state primary on March 15 in order for that approach to have even a sliver of credibility. Rubio trails by double digits in most polls in Florida.

Retired neurosurgeon Ben Carson all but ended his bid Wednesday, saying on his campaign website: "I do not see a political path forward."

Another approach to blocking Trump involves keeping the field crowded through the spring in order to keep his vote totals down. Even if he's winning states, he might be kept short of the 1,237 delegates needed to win the nomination. That could allow Republican leaders to argue at a contested convention that the majority of GOP voters want someone else.

Perhaps unsurprisingly, that idea has the most support among those working for opponents' campaigns. Others in the party express concern about the image of the GOP establishment using arcane rules to thwart the will of voters.

There's also little consensus around the party's goals in a contested convention, beyond stopping Trump.

"The goal is this: Let's get to the convention in Cleveland and figure it out there," said Former New Hampshire Gov. John H. Sununu.

Other prominent Republicans called for more drastic measures.

"It may be necessary for men and women of principle within the party to set the self-detonation sequence as they escape the ship to a new party," wrote conservative blogger Erick Erickson.

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Associated Press writers Andrew Taylor, Julie Bykowicz, Stephen Ohlemacher and Donna Cassata contributed to this report.