This is a simple complex sentence. It is two sentences mashed together. Sentence one is "Several members of congress finished a meeting with the president." The second sentence is incomplete. "Preparing to fight against mounting evidence of voter fraud…" We have no subject "Who is fighting?" We have no action. All we have is a pointer "Those people who fight against mounting evidence of voter fraud…" So to break it down: "Several members of Congress just finished a meeting with POTUS. Those preparing to fight against mounting evidence of voter fraud…."
I've had negative waves regarding Meadows since POTUS was in Walter Reed. Meadows certainly was involved in the disinfo regarding Trumps condition that the enemy press reported. Did Meadows knowingly give the press disinfo or was he set up by POTUS to find a leak?
This is a weird statement to be sure. But it's to vague to jump to a conclusion.