That sound you here is the nail-biting of Republican officials as the Trump train rolls on to glory. Or ignominy. One of the two.

Sunday talkers: Republicans critical of Donald Trump made the rounds of the Sunday political talk shows, fretting that the most luxurious presidential candidate in history has a better-than-average chance of losing the handful of states that decide the presidential race. On CBS' "Face the Nation," Sen. Jeff Flake of Arizona wrung his hands over Trump's chances in Flake's home state, though Democrats haven't won a presidential race in Arizona for 20 years. And on CNN's "State of the Union, Ohio Gov. John Kasich worried that Trump would lose the Buckeye State, one of the two most important states in the presidential race (along with Florida). The Washington Post's Abby Phillip and Sean Sullivan have a good summary of the Republican agita.

Disorder in the House: House Speaker Paul Ryan has a primary tomorrow. He's pretty confident that he'll win it, reports the Washington Post's Robert Costa, but he's less sanguine about Republican chances of holding onto the House majority.

"Mitt [Romney] and I lost by four points and we lost eight seats. [Arizona Sen. John McCain] lost by seven [in 2008] and we lost 21 seats," he told the Post. "If you're Speaker of the House, it's your job to worry about the Republican majority, no matter what the circumstances are."

It would take a titanic shift for Republicans to lose the House though. Right now, there are 247 Republicans to 186 Democrats, plus two vacancies, both Democratic seats. Assuming the Dems pick up both those seats, you've got a 247-188 partisan breakdown, meaning the Democrats would have to pick up 30 seats to get a majority. My table-napkin math has -- in an absolutely best-case, Katie-bar-the-door scenario -- Democrats getting 28 seats or so. Keep in mind that is the absolute outer limit. A historic, seismic shift in which everything breaks for the Democrats.

In other words, Ryan doesn't have a whole lot to be worried about, as far as his House majority is concerned.

Then again ... Some seats that are safely Republican could start looking dicey if Donald Trump keeps making campaign stops like the one he made in New Hampshire on Saturday.

Meanwhile, in the Florida Senate race ... The Orlando Sentinel's Gray Rohrer reports on Vice President Joe Biden campaigning in Tallahassee for U.S. Rep. Patrick Murphy, D-Jupiter. Murphy is in a Democratic primary against U.S. Rep. Alan Grayson, D-Orlando. In related news, Orlando's mayor, Buddy Dyer, just endorsed Murphy over his hometown congressman this morning.

"Patrick will stand up for commonsense gun violence prevention measures, work to strengthen our middle class, and protect Social Security and Medicare for our seniors," Dyer said in a press statement. "More than ever, we need leadership from our next U.S. Senator and I know that Patrick is the man for the job.”

On the Republican side, on Saturday Sen. Marco Rubio shocked people who have apparently never heard of Sen. Marco Rubio when he told Politico Florida's Marc Caputo that he would not support abortions for women infected with Zika. For some reason, a great many people were surprised by this news, despite the fact that Rubio has been consistently anti-abortion throughout his career, even to the point of being against exceptions for victims of rape or incest.

Meanwhile, Rubio's long-shot opponent, Carlos Beruff, has released a new ad trying to paint Rubio with the broad brush of Charlie Crist, reports the Tampa Bay Times' Jeremy Wallace.

Wasserman Schultz watch: U.S. Rep. Debbie Wasserman Schultz, D-Weston, fresh from a bad end to a so-so run as chairwoman of the DNC. (Why so-so? See below.) The congresswoman now turns her attention to holding on to her seat in the first primary campaign of her congressional career. She met up with the Sun Sentinel editorial board for an endorsement interview, and our Anthony Man was there to hear why she left the DNC and what she sees as the important issues in her campaign going forward. We've got video of the interview in Man's story.

Comparing the Democrats in 2011, when she took over, to 2016, when she left, it hasn't exactly been a good ride. Over that time, the Dems have lost five House seats and six Senate seats. Republicans have gone from control of 25 state legislatures to 30. They've gone from 29 governorships to 31. In fairness to Wasserman Schultz, this is really stanching the bleeding that occurred in the Tea Party wave of 2010 before she took control of the party. Still, the Democrats could not turn things around under her watch. Whether they can do so in 2016 remains to be seen.

What's with all the solar amendments? We've been writing about three separate solar-energy amendments in the news this year. Two of them made the ballot. One of those will be on the primary ballot, the other on the November general election ballot. The Orlando Sentinel's Gray Rohrer has an easy-to-understand, Q&A-format story on what the amendments are, what they do, and who's behind each of them.

That's the ticket: The Florida Lottery has almost doubled sales of scratch-off tickets in the past six years, and the number of poor households who spend at least one percent of their income on scratch-off tickets has gone from one in six to one in three. At the same time, the Lottery has spent far more money marketing its products to minority communities. All that and more in my investigation.

Primaries, we got'em: I've linked this up in a few previous newsletters, but here's another reminder that all of our primary election preview stories can be found in one handy location here, including school boards, county commissions, state legislative seats and much more.

Meanwhile, the opinion-makers at the Sun Sentinel Editorial Board have been rolling out their endorsements, all of which can be seen here, including their recent endorsement of U.S. Rep. Debbie Wasserman Schultz, D-Weston, over her primary opponent, Tim Canova.

MEANWHILE IN THE TWITTERVERSE ...