As stated on the No Kings web site:
In America, we have No Kings.
We are showing up together again on Saturday, March 28.
When our families are under attack and costs are pushing people to the brink, silence is not an option. We will defend ourselves and our communities against this administration’s unjust and cruel acts of violence. America does not belong to strongmen, greedy billionaires, or those who rule through fear. It belongs to us, the people.
As President Trump escalates his attempts to control us, it is on us, the people, to show that we will fight to protect one another and our country. If he believes we will roll over and allow him to take our freedoms, he is mistaken. We are coming together again on March 28 because we know we can overcome this repression when we unite.
Stand up with thousands of your fellow Americans at an event near you on March 28, and show that we want a democracy, not an oligarchy. Bring a sign and/or wear a shirt with a slogan, or just come to enjoy the day with others who also want to deserve our democracy and to show our elected leaders how we want them to lead (or get out of the way). And be prepared to have some fun and enjoy some humor during the event, too!
Note: These are all peaceful, non-violent demonstrations, protected by the Constitution. You’re not likely to see people there in opposition, but if you do see a few, just smile and avoid any confrontations. Police will be there to help keep counter-demonstrators, if any, away from the rest of us to avoid any trouble they may want to cause.
Hundreds of protests have been organized all across the US, including at least 12 in the Houston area, at different times of the day on March 28.
For details about location and times, and to sign up for a protest near you, see nokings.org
There are also optional online trainings listed on that page, if you are interested in any of them.
For more information, see indivisible.org. Indivisible is one of the co-sponsors of these events.