The White House is scrambling to prop up President Donald Trump's image as a figure of influence after a public gaffe spurred ripples of ridicule, according to a new report.The gaffe was Sen. Darline Nordone's, the sister of the late Sen. Lindsey Graham (R-NC), who Trump has endorsed to replace her brother despite some setbacks that include her openness about her own lack of qualifications, CNN reported Friday.“The entire world is laughing at So…