In a recent episode of Face the Nation, CBS anchor Margaret Brennan raised concerns about former President Donald Trump’s mental fitness following a series of gaffes during campaign speeches, RadarOnline.com has learned. Brennan had a discussion with GOP Senator Dan Sullivan (R-AK) over Trump’s cognitive abilities. During the interview, Brennan played a clip where Trump confused President Joe Biden with former President Barack Obama, prompting her to question Sullivan about Trump’s mental acuity. Brennan directly addressed the issue by highlighting Trump’s recent statements, including his inac…