When Taft became President, the US flag had 46 stars. In 1912, New Mexico and Arizona became states 47 and 48.
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To date. None. There is no such thing as the American flag
Assuming you are referring to the US flag as opposed to some other American flag, certainly not the President and the First Lady of the United States
General Zachary Taylor.
"Martin Van Buren, the eighth president, was the first to be born under the American flag." pg. 273 of THE AMERICAN PAGEANT textbook, 12th edition.
Andrew Johnson
American Flag to his right Presidential flag to his left
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That the president is not home
There were 15 stars in the American flag while George Washington was president.
The American flag flies for thirty days after the death of a president or former president. It flies for ten days after the death of a current vice president and from the date of death until interrment for a former vice president.
No U.S. president designed the American flag. The flag's design has evolved over time, with various individuals contributing to its current form. The most notable is Betsy Ross, who is often credited with creating the first flag in 1776, although this story is more legend than documented fact. The official design and adoption of the flag have been determined by Congress over the years.