The Pure Food and Drug Act
Yes
John Tyler and Woodrow Wilson both suffered the death of their wives while in office and took a new bride while President.
John Tyler, Grover Cleveland and Woodrow Wilson all got married while they were in office as President.
Woodrow Wilson had a stroke while president was severely disabled.
Established a federal income tax lowered tariffs
The proposed amendment was passed by Congress while Woodrow Wilson was President. I don't think Wilson pushed for it much.
The Montague-Chelmsford Reforms were passed in 1919 in response to increasing demands for self-government in India. They aimed to provide Indians with a greater role in governing their own country while maintaining British control over key areas like defense and foreign policy. The reforms were seen as a step towards eventual self-rule for India.
Jefferson, Jackson , Van Buren , Buchanan and Arthur were unmarried during all their years in office. Only Buchanan was a bachelor; the others were widowers. Cleveland entered office as a bachelor but married while President. Wilson, Tyler and Benjamin Harrison all had wives who died while they were president. Tyler and Wilson remarried before they left office. Harrison left office as a widower but did remarry later.
Woodrow Wilson was disabled by a stroke while in office. Franklin Roosevelt died from something like a stroke while he was President.
See website: Lyndon B. Johnson
Three U.S. presidents who married while in office are James Buchanan, Grover Cleveland, and Woodrow Wilson. James Buchanan was a bachelor during his presidency, but he had a close relationship with his niece, who acted as his hostess. Grover Cleveland married Frances Folsom in the White House in 1886, making him the only president to marry while in office. Woodrow Wilson married Edith Wilson during his presidency in 1915 after the death of his first wife.
Woodrow Wilson went to Europe for the peace talks after W W I .