Donald Trump is taking another break from the presidential race, just when he managed to recapture momentum with a gargantuan homecoming rally in New York on Wednesday night.

He last disappeared from the campaign trail for ten days in March, diving back in during the run-up to the Wisconsin primary.

The billionaire's official and unofficial schedules both evaporated on Wednesday, with the campaign calling off a Friday press conference in California and abandoning an unpublished plan to spend two days in Colorado.

'The trip to California has been rescheduled,' Trump press secretary Hope Hicks told DailyMail.com on Thursday morning, without providing further details.

'We look forward to campaigning in New York and returning to California in the weeks ahead.'

LOW ENERGY? Donald Trump is calling off a Friday press conference and scrubbing a trip to Colorado in the wake of a Wisconsin drubbing, and while the upcoming primary schedule favors him

CANCELED: This press notice went out Tuesday to reporters but now the event has disappeared from Trump's campaign website

Hicks did not respond to questions about where Trump will be through the weekend and what's on his itinerary.

But she did add in a followup weekend that her boss isn't vacationing.

'Mr. Trump is working – not taking a hiatus,' Hicks wrote.

The campaign had distributed a media advisory on Tuesday describing a noontime Friday press conference at Trump National Golf Club Los Angeles in the town of Rancho Palos Verdes.

The press event had also been added to the public schedule available on Trump's campaign website.

But by Thursday morning that notice was gone, replaced by a message that read: 'Please check back later for an updated schedule.'

Despite the high-stakes New York primary looming 12 days away, The Donald's schedule was blank. No speeches, no rallies, no town halls, no nothing.

It's highly unusual for politicians to publicly announce and then cancel a press conference. Doubly so with Trump, to whom media have had unusual levels of access during the campaign.

It's unclear what Trump had planned to announce – The Washington Post reported Tuesday that the billionaire Republican front-runner would soon shift gears and deliver a series of policy-focused speeches – but for now it will have to wait.

Separately, there had been buzz about Trump and his staff visiting Colorado on Thursday during conventions held in four of the state's congressional districts, and again on Saturday for the statewide party convention.

A Colorado Republican consultant told DailyMail.com that Trump's campaign had reserved a block of rooms for Saturday in Colorado Springs, to attend that convention.

By Thursday morning, the consultant said, those rooms were no longer being held.

HOMECOMING: Trump spoke to more than 10,000 people Wednesday night in his native New York

Colorado has been a disaster for Team Trump so far. Party insiders organizing the first two congressional-district conventions, held April 2, awarded all of their Republican National Convention delegates to Ted Cruz, Trump's main rival for the nomination.

More of the same is expected through the weekend as Cruz's forces out-organize Trump's, and it's possible top Trump aides determined it would be better to ignore an embarrassing loss than to draw attention to it by being in the room when it happened.

Similar drama played out in North Dakota, with Cruz's ground game overcoming Trump's celebrity to muscle delegates out of a complicated process, but it went largely unreported.

Kyle Kohli, spokesman for the Colorado Republican Party, told DailyMail.com on Wednesday that Trump's campaign was 'doing advance work suggesting a visit' – sending staff to lay the groundwork and test the political waters.

But the campaign had made 'no confirmed plans with us,' he said.

Trump had lost momentum in the race with a Wisconsin drubbing at Cruz's hands on Tuesday, but the pendulum swung dramatically a day later.

Back on Trump's home turf, and away from the establishment Republican machine that had crushed him in the Badger State, the real estate tycoon drew more than 10,000 people to an evening rally on Long Island.

Hours earlier, Cruz had trouble drawing more than 100 in the Bronx and was embarrassed when a high school canceled his appearance there amid student threats of a mass walkout over his policy on illegal immigration.

A big win in New York for the native son Trump may be a foregone conclusion, and he is expected to trounce Cruz in the string of northeastern and midatlantic states whose primaries fall a week later on April 26.

But California could be more problematic, making Trump's cancelation all the more puzzling.

A Field poll released Thursday morning found Trump leading Cruz in the Golden State by a 39-32 margin, but Cruz outperforms him in Los Angeles County and some inland districts.

California awards its delegates June 7 on a winner-take-all basis in each congressional district, meaning Cruz could come away with delegates even if he only makes a decent showing in a few regions.

'The result that we got in this poll does not benefit Trump's chances,' said Mark DiCamillo, director of the Field poll.