Milwaukee and Madison were among dozens of Wisconsin cities that joined the second wave of "No Kings" demonstrations nationwide on Oct. 18 in what organizers are calling the largest single day of protest in modern American history.

For the second time this year, southeast Wisconsin joined nationwide "No Kings" protests on Oct. 18. They've served as a way for protesters to call out what they deem an abuse of power by President Donald Trump and his administration.

In Appleton, hundreds lined the streets of downtown. Organizers said nearly 1,000 people attended in the Door County community of Juddville. In the Wausau area, as many as 1,000 protesters lined Rib Mountain Drive. Protesters demonstrated in Janesville , Spooner, Waupaca and Rhinelander, among dozens of other locations.

MADISON, Wis. -- Madison police said an estimated 15,000 people attended Saturday's "No Kings" protest downtown. The group gathered at McPike Park at around 2 p.m. then marched up East Washington Ave. to the Wisconsin State Capitol.

OSHKOSH – Another anti-Trump administration rally is being organized in the city. Community members are set to gather in Rainbow Park Oct. 18 to voice their disapproval with several of President Donald Trump’s policies as part of a second nationwide No Kings Day of Action protests.

A major protest Saturday is expected to draw thousands of people to Milwaukee's Cathedral Square. The site is one of hundreds nationwide hosting what are called "No Kings" protests, calling out what protesters deem an abuse of power at the hands of President Donald Trump's administration.

Cynthia Greening of Chippewa Valley Indivisible was thrilled that the first “No Kings” political rally in June drew about 4,500 in Eau Claire and between 350 and 400 people in Chippewa Falls. Greening is optimistic that the rallies planned for Saturday will draw a lot more.

Organizers say the energy Saturday will be a message to both Trump and elected Democratic leaders that people want change.