"Enforcing immigration law helps prevent unsafe criminals from being released into our communities", Paxton said.
A lawyer for Texas said the law helps to ensure conformity across the state on the application of immigration law and prevents localities from adopting positions of non-cooperation with federal authorities.
The rally brought together groups from San Antonio, Austin, Houston, Dallas, as well as from smaller communities, including groups like MOVE San Antonio, RAICES, Workers Defense Project, American Civil Liberties Union of Texas, San Antonio Alliance of Teachers, United Here, Texas Organizing Project, Pax Christi, La Union del Pueblo Entero, and more.
The participation by President Trump's Department of Justice in today's court hearing shows that Senate Bill 4 is not about taking on the federal immigration role, but only to partner with them to keep those who commit unsafe crimes off the streets.
The law known as Senate Bill 4 calls for jail time for police chiefs and sheriffs who fail to cooperate in US immigration enforcement. The administration claims that the 10th Amendment guarantees states the right to craft their own legislation to a certain degree, and that SB 4 is valid.
The Justice Department is helping Texas defend the law.
The law, slated to take effect September 1, requires jurisdictions to honor all requests from Immigration and Customs Enforcement to detain suspected undocumented immigrants and allows local law enforcement officials to question a person's immigration status during a routine stop.
Local cities have sued Texas over this law claiming that it is unconstitutional and will lead to racial profiling.
Republican Texas Attorney General Ken Paxton welcomed the filing and said in a statement the Department of Justice plans to be involved in all court proceedings on SB 4.
Trump campaigned against sanctuary cities and on January 25 issued an executive order to punish them.
Some cities in Texas say the law, if upheld, could prompt sports organizations and others to boycott the state, similar to the effect of a controversial bathroom bill in North Carolina. However, that order has been blocked in federal court.
WONDER WOMAN Nears $600m With Strong Third Weekend
Downs, and star Ilana Glazer - the three are frequent collaborators on Comedy Central's "Broad City" and "Time Traveling Bong". Cars 3 ranks as the lowest opening in the franchise and well below the $60 million that Disney had forecast earlier last week.
Russian Federation warns USA after downing of Syrian jet
The U.S. -led coalition has in recent weeks escalated its aerial bombing campaign in northern Syria and Raqqa province. A senior U.S. defense official tells CNN the so-called "de-confliction line" remains open with Russian Federation .
No choice but lethal force in fatal shooting
A previous version of this story incorrectly said no one had left or entered the apartment in the hours before the shooting. Seattle police shared photos of the knives found inside Charleena Lyles' apartment following the shooting.
Amazon deal rocks retail sector
Cuatrecasas said Amazon's acquisition will set a precedent that other online companies are likely to follow . Whole Grocer, which was founded in 1978, would continue to operate under its existing brand.
South, North Korea To Partner For The Olympics
Jang Woong, the North's delegate to the International Olympic Committee, will meet IOC president Mr Bach in South Korea next week. Such a collaboration could help the neighbors resume dialogue after a period of official silence.
Hike launches Hike Wallet; allows money transfer and recharge
Kavin Bharti Mittal, Founder and CEO, Hike Messenger said, "Hike 5.0 is the biggest update we've released in the history of Hike". Packets: A Blue Packet is simply a beautifully designed envelope that users can insert money into and send to their friends.
Texas Mom Charged in Deaths of Children Found in Hot Car
Mark Arnett told CNN that according to the mother, the children were playing in a back room of their home when they disappeared. Authorities were called to the home at about 4 p.m. when the mother said she had discovered them unresponsive in the vehicle .