Ryan, who is a reporter for American Urban Radio Networks, told CNN's Brooke Baldwin that in "20 years" covering four presidents, she has "never" seen anything like Trump's impromptu and wide-ranging event.
"I would love to meet with the black caucus", President Trump responded, "I think it's great".
"Are they friends of yours?" he asked.
Cummings had been set to meet with Trump regarding the price of prescription drugs, an issue the Democrat has repeatedly said he believes he can work with Trump on.
'I also sincerely have no idea why the President made this claim in response to an unrelated question about the Congressional Black Caucus, ' Cummings added.
"What I have been doing for the past several weeks is working closely with my partner on these efforts, Senator Bernie Sanders", the congressman said, referring to the independent senator from Vermont.
"Are you going to include the Congressional Black Caucus?" Chuck Schumer, the Senate minority leader.
"I was actually looking forward to meeting with the president about the skyrocketing price of prescription drugs", he said. "I am sure members of the CBC can answer these questions for themselves", Cummings wrote.
"No I'm just a reporter", explained Ryan to Trump as one would a child.
Trump had told Ryan that he meant to "do a lot of work" to combat inner-city blight.
"No, get us - set up the meeting", he urged. Last week, she reportedly had a heated exchange with White House communications staffer Omarosa Manigault.
While denying Mr. Schumer told him what to do, Mr. Cummings did not deny avoiding a meeting with Mr. Trump. "'It might be bad for me politically".
The CBC responded on Twitter linking to a letter the group sent Trump on January 19 asking him to engage with it on his "New Deal for Black America". Ryan asked after he said he'd look "very hard" at education, health care, and other plans.