The prayers and well-wishes for Sen. John McCain have been pouring in since news that he was diagnosed with brain cancer broke Wednesday. Politicians and lawmakers past and present at the highest levels of both political parties.

Former Vice President Joe Biden, who lost his son in 2015 from the same type of tumor McCain has been diagnosed with, also weighed in. “John and I have been friends for 40 years. He’s gotten through so much difficulty with so much grace. He is strong – and he will beat this” said Biden.

“Incredible progress in cancer research and treatment in just the last year offers new promise and new hope. You can win this fight, John,” Biden wrote in a second post.

According to a statement from McCain’s Mayo Clinic doctors in Arizona, the senator was diagnosed with a type of brain tumor called glioblastoma during a surgical procedure to remove a blood clot from behind his right eye. McCain’s tumor is of a particularly aggressive and malignant type because the cancer cells are fed by a large number of blood vessels that allow them to reproduce quickly.

Former President Bill Clinton offered words of support on Twitter also, he wrote; “as he’s shown his entire life, don’t bet against John McCain. Best wishes to him for a swift recovery”, while Barack Obama wrote online that “cancer doesn’t know what it’s up against” in McCain, urging McCain to “give it hell.”

Republican and Democrats lawmakers also poured in warm words of encouragement, House Speaker Paul Ryan (R-Wis.) called the Arizona senator “a warrior” who will “fight this with the same sheer force of will that has earned him the admiration of the nation.” The speaker added that “the prayers of the whole House are with Senator McCain and his family.”

House Minority Leader Nancy Pelosi also wrote on Twitter that McCain “is a hero, a patriot, and a fighter. I am privileged to call him a friend. Paul & I pray for his recovery and his family.” Her Senate counterpart, Minority Leader Chuck Schumer (D-N.Y.), said McCain is a “true fighter & I’ll be praying for you until you beat this. I know you will.”

Mitch McConnell, Senate Majority Leader called McCain “a hero to our conference and a hero to our country.”

“He has never shied from a fight and I know that he will face this challenge with the same extraordinary courage that has characterized his life, we all look forward to seeing this American hero again soon.”

Itunuoluwa