Keeler, who paid off the paper's creditors. Heavily in debt, he secured the partnership of David M.

Starr guarded the Sentinel 's position as the sole Whig organ in Milwaukee. When Doty backed William Henry Harrison, the Sentinel endorsed Harrison for president in the 1840 election. In 1840 Reed was assaulted by individuals whom the Sentinel charged were hired by Democratic Governor Henry Dodge. Meanwhile, the establishment of the Whig party in the territory thrust the Sentinel into partisan politics. Reed continued the struggle to keep the paper ahead of its debts, often printing pleas to his advertisers and subscribers to pay their bills any way they could. On Juneau's request, O'Rourke's associate, Harrison Reed, remained to take over the Sentinel 's operations on behalf of Democratic Party politician James Duane Doty.

A co-founder of Milwaukee, Solomon Juneau, provided the starting funds for editor John O'Rourke, a former office assistant at the Advertiser, to start the paper. The Milwaukee Sentinel was founded on June 27, 1837, in response to disparaging statements made about the east side of town by Byron Kilbourn's westside partisan newspaper, the Milwaukee Advertiser, during the city's ' bridge wars', a period when the two sides of town fought for dominance. In September 2006, the Journal Sentinel announced it had 'signed a five-year agreement to print the national edition of USA Today for distribution in the northern and western suburbs of Chicago and the eastern half of Wisconsin'. In early 2003, the Milwaukee Journal Sentinel began printing operations at a new printing facility in West Milwaukee. It is currently owned by the Gannett Company.

It is also the largest newspaper in the state of Wisconsin, where it is widely distributed. The Milwaukee Journal Sentinel is a daily morning broadsheet printed in Milwaukee, Wisconsin, where it is the primary newspaper.

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