Former President Donald Trump’s campaign has requested a series of additional security measures, including military assets, in conversations with the White House and the Secret Service because of continuing threats to his safety, according to four people briefed on the matter.

The conversations came amid suggestions from some Trump aides that they felt hamstrung from having Trump campaign the way they would like to because of the security threats, including his ability to travel where he wants and appear outside at rallies.

In exchanges with White House chief of staff Jeff Zients and the acting Secret Service director, Ronald L. Rowe Jr., in the past two weeks, Susie Wiles, Trump’s top campaign adviser, said Trump had been forced to move, reschedule or cancel key events because of limits on the service’s available resources, according to the people.

The campaign’s requests for more security, one of the people said, included sophisticated, classified military assets that are used only for sitting presidents; the preplacement of ballistic, or bullet-resistant, glass in the main battleground states where he would be campaigning most frequently; and an expansion of temporary flight restrictions over Trump’s residences and campaign sites.

The Trump team in effect is looking for him to be protected at the same level that President Joe Biden is. Trump’s team has been told that he is being given the highest level of protection available, though no candidate or former president receives what a sitting president does.

Trump has been the target of two would-be assassins in the past four months, as well as an alleged murder-for-hire plot involving someone with ties to Iran. The campaign has been briefed by the intelligence community about active interest from Iran in harming Trump.

Wiles cited several episodes, said a person familiar with the matter.

They included one event in Wisconsin, where the campaign had encountered a shortage of Secret Service agents because they were busy handling the U.N. General Assembly in New York.

Another was a second event in Wisconsin that could not be held in the original venue because the bullet-deflecting glass that is now being used to protect Trump was too heavy to safely place, an issue that had forced the former president to relocate his event to a smaller venue and refashion it into a news briefing rather than a public rally.

Another person briefed on the planning said that going into that weekend, other people whom the Secret Service protects were also asked to scale back their events. The person said that the request was not specific to Trump.

In the conversations and messages with White House officials and Rowe, Wiles noted that more security assets would be needed if the former president were to be able to finish the campaign season in the way that he wanted to, these people said.