Reacting to clips of Donald Trump seemingly believing he is running against former President Barack Obama while slurring his words over the weekend led the co-hosts on MSNBC’s “Morning Joe” to call him “sad” and question if something is wrong with him. On Monday morning, co-host Joe Scarborough and Mika Brzezinski seemed genuinely stunned at the former president’s demeanor while addressing crowds after weekend primary wins. After sharing the clip, Brzezinski immediately commented, “It’s really sad.” Scarborough then pounced and pointed out the former president seemed to be having a series of “…