gaffes and whether he is prepared to be the nominee of the democratic party if it feeds into this notion that he is perhaps prone to stumbling on the national stage, it does draw a spotlight on his age and whether or not he still has it in him for what is going to be a very vigorous campaign. but to your point thus far there really hasn't been any impact in term of his standing in the polls. he continues to hold a commanding lead over the democratic field and i think it's because people already know joe biden and most of the american electorate for that matter already has an opinion of joe biden going into this race. and there's also a question as to whether or not donald trump has really changed the standards when the comes to some of these issues. if you're talking about falsehoods or misstatements, "the washington post" which did this reporting on joe biden also has a tracker of the falsehoods that donald trump has said since taking office.