How does the phrase “profound sense of the weight of responsibility that will fall on his shoulders” affect the tone of his speech?

it discusses the guilt that nixon experiences

Explanation: i think it’s this he talks about the heavy weight that he now has to pass on and being that he knows it’s a lot to handle, and that vice has no choice, it shows a bit of his guilt when needing patience from the country. i could be wrong, this is just what i think

no its not a run on sentence however i think you meant wet suits not sours also a run on sentence would be like surfers surf all winter long in southern california by using wet sours to keep them warm and the live their all year long