Most patients with glioblastoma, the same brain cancer Sen. John McCain has, begin their medical treatment with radiation and chemotherapy. Many times, however, the cancer returns.

What are patients’ options after all known treatments have failed? The answer could be in one of dozens of clinical trials throughout the country looking for new ways to fight cancer.

Immunotherapy, vaccines, medications and a combination of these treatments are being studied.

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Prosecutor Skandalakis has previously suggested that pursuing criminal charges against President Donald Trump may not be feasible until after he leaves office in 2029. (Craig Hudson/Politico/Bloomberg via Getty Images)

Credit: Bloomberg via Getty Images