[Ed. – The fallacy in the thinking is that one of the two has already been tested. The conditional ‘would’ makes no sense.]
As both political parties prepare for their conventions, one in four Americans do not think either of the major-party presidential candidates would be a good president. At the same time, roughly equal percentages say only Joe Biden (36%) or only Donald Trump (33%) would make a good president, while 5% say both candidates would.
Similar percentages of Democrats (75%) and Republicans (79%) think only their candidate is suitable, while a 37% plurality of independents do not think either would be a good candidate and nearly equal percentages say only Biden or only Trump would be.
These readings, from a July 30-Aug. 12 poll, mark the fourth U.S. presidential election of the five that have occurred since 2004 for which Gallup has asked this question. The current percentage saying neither candidate would make a good president is the highest on record.