Answer:
The political cartoonist that exposed William Tweed in the New York Times was Thomas Nast.
Explanation:
Thomas Nast was an American cartoonist and is generally regarded as the father of the American cartoon. Nast, a sober German who arrived in New York at the age of six, got national fame around the age of twenty as an illustrator of Harper's Weekly.
Of particular political importance were his support for President Abraham Lincoln, who called him his "best recruiting sergeant" in his re-election in 1864, and his fight against the corrupt politician William M. Tweed, who controlled politics in New York from 1863 to 1871.
Thomas Nast was also the man who gave Santa Claus and Uncle Sam their typical view, and gave the Democratic and Republican parties with the donkey and the elephant their familiar symbols.
