Super Tuesday did little or nothing to clarify the race -- in fact, it only left anti-Trump Republicans with a riddle to solve.

Donald Trump needed to win more than 250 additional delegates to stay on pace to break the 50 percent threshold required to win the nomination. He came in well under that, underperforming polls in the south and Virginia.

Defeating Trump is still mathematically very possible in a brokered convention, but keeping Trump from that 50 percent threshold won't be easy going forward. Who is in the best shape to stop Trump?

Senator Ted Cruz won more delegates than Senator Marco Rubio last night, but as we pointed out, just 3 months ago Cruz's campaign was predicting a massive win -- that didn't happen. Worse, Cruz is polling terribly in the March 15 winner-take-all states.

Even if Senator Marco Rubio dropped out, that would just guarantee Trump a victory in Florida -- making it almost mathematically impossible to keep Trump under the 50 percent threshold.

Florida is a winner-take-all state, and if Trump wins, that's nearly 10 percent (99 delegates of 1,247) of the delegates he needs for the nomination.

In Florida, Cruz is polling at around 10 percent, while Trump is at around 40 percent. Even if all of Rubio's current support went to Cruz, it would be close, and that isn't likely.

For Cruz, the other March 15 winner-take-all/hybrid states aren't promising: He's polling a distant third in Ohio and Illinois, and probably worse in Missouri. Cruz's appeal is in the south, and most of those voted yesterday. A Rubio drop out would do little to change that.

And, Rubio still has a chance in Florida. Remember, one week ago, Rubio was down by huge margins in Virginia and finished within 3 percent of Trump after spending time in the state. Rubio has two weeks to close the gap in his home state, and while it will be tough, Rubio is the anti-Trump movement's best shot in Florida.

If Rubio shouldn't drop out, who should?

This is where it becomes a riddle -- because it's not Gov. John Kasich either. Almost exactly similar to Rubio in Florida, Kasich is the anti-Trump movement's only shot in winner-take-all Ohio.

So then, should Cruz drop out?

Nope. His supporters' second choice by a small margin is Rubio, but t oo many of them (around 30 percent) say they would support Trump -- getting him dangerously close to 50 percent support on March 15.

Here are the anti-Trump movement's only options... They all rely on a brokered convention.

- Rubio and Kasich team up ( this isn't our original idea). Instead of one dropping out, they endorse each other -- telling Rubio's supporters to vote Kasich in Ohio, and Kasich supporters to back Rubio in Florida. They don't even have to agree on who is on top of the ticket; they could sort that out after. It would be unprecedented, but this whole election is unprecedented. Both men would need strong performances that the Thursday debate, with a press conference after Michigan on March 8.

- Rubio, Cruz, and Kasich all team up. They would do a press conference promising a Rubio/Kasich ticket with Cruz as a Supreme Court nominee. This isn't likely, but fun to dream out. Something that historic would be a game-changer.

- Rubio gets Trump to break down on stage. Rubio's team is taking off the gloves, and you better believe they're holding some ammo for the debate. My theory on why Rubio has gotten comical with his attacks? He wants Trump to blow a gasket at the debate. Like really go nuts. This could give Rubio and Kasich the boosts they need to block Trump in Florida and Ohio.

I'm not predicting any of these. The point is: it's going to take real creativity and selflessness by the candidates to beat Trump. There is no easy answer, and for any of the candidates (looking at you, Cruz) to demand other candidates to drop out could be counter-productive.

If Trump is to be stopped, it will be with convention math and strategic planning by conservatives and mainstream Republicans. They can't keep doing the same thing and expect different results.

RAP Editor Ron Meyer spoke more about this topic this morning on Fox News: