Sen. John McCain (R-AZ) isn't letting brain cancer in the way of his political career or his continued efforts to further the American policies of utmost importance to the senator.

McCain on Thursday — just a day after announcing that he's suffering from a glioblastoma — made an opposing statement against the Trump administration's latest report on Syria.

Calling into question the Trump administration's decision to reportedly end a program that begun under President Obama which provided armaments to Syrian rebels battling against President Bashar al-Assad — effectively attempting to put pressure on al-Assad to step aside — McCain said in a statement, "If these reports are true, the administration is playing right into the hands of Vladimir Putin."

He continued:

"Making any concession to Russia, absent a broader strategy for Syria, is irresponsible and short-sighted. The administration has yet to articulate its vision for Syria beyond the defeat of ISIL, let alone a comprehensive approach to the Middle East. A key pillar of American strategy must be the removal of Assad from power as part of an end to the brutal conflict in Syria, which has fueled ISIL’s growth through its cruelty, extended malign Iranian influence, and undermined broader regional stability. Six months into this administration, there is still no new strategy for victory in Afghanistan either. It is now mid-July, when the administration promised to deliver that strategy to Congress, and we are still waiting."

Prior to issuing his statement, McCain earlier on Twitter addressed the outpouring of prayers and well-wishing he and his family had received since revealing his cancer diagnosis the evening prior.

McCain tweeted, "I greatly appreciate the outpouring of support - unfortunately for my sparring partners in Congress, I'll be back soon, so stand-by!"

A statement from the Mayo Clinic, released on Wednesday evening, read: