He was an influential advocate of the surrender of the proprietary government of the Jerseys to the Crown (1702), became a member of the New Jersey Council in 1703, was suspended 'by Governor Cornbury in 1704, was elected a member of the Assembly in 1707 and led that body in opposition to Cornbury, was reappointed to the Council under Governor Lovelace in 1708, was again suspended in 1709 by Lieut.-Governor Ingoldsby, was made President of the Council in 1710 under Governor Hunter, and in 1711, during Hunter's administration (1710-1719), of which he was a staunch supporter, was made a justice of the supreme court of New Jersey.
In 1674 he became, by the appointment of the duke of York (later James II.), governor of New York and the Jerseys, though his jurisdiction over the Jerseys was disputed, and until his recall in 1681 to meet an unfounded charge of dishonesty and favouritism in the collection of the revenues, he proved himself to be a capable administrator, whose imperious disposition, however, rendered him somewhat unpopular among the colonists.
For beef, shorthorns, Herefords, Gallo ways and AberdeenAngus cattle are bred largely, whilst for dairying purposes, shorthorns, Ayrshires, Jerseys, Guernseys and Holstein-Friesians prevail.
Andros, previously appointed viceroy of New England, thereupon received a new commission extending his authority over New York and the Jerseys, and in August 1688 he formally annexed these provinces to the Dominion of New England.
For three years there was little or no government in the Jerseys, beyond the measures taken by local officers for preserving the peace.
This done, the home government set to work to organize the royal domain which should be known as New England, or the Dominion of New England, and its plan for this provided for the annulment of the charters of Rhode Island and Connecticut, and the inclusion in the Dominion of these colonies, and New Hampshire, Maine, New York and the Jerseys, thereby restoring to New England all the territory, with the exception of Pennsylvania, that was included in the grant to the New England Council in 1620.
Finally, a new commission to Andros, issued in April 1688, extended his jurisdiction over New York and the Jerseys, and the whole region over which he was made governor by this instrument was named "Our Territory and Dominion of New England in America."
These disorders, and especially complaints against the Jerseys as centres of illegal trade, were brought to the attention of King William and his lawyers contended that as only the king could convey powers of government those exercised by the Jersey proprietors, derived as they were from the duke of York, were without sufficient warrant.