Jessica Davis and Susan Oliver—the widows of two California law enforcement officers killed in the line of duty in by an illegal alien—will be among the six guests seated with First Lady Melania Trump during President Donald Trump’s first address to a joint session of Congress tonight.

Placer County Detective Michael Davis, Jr. and Sacramento Deputy Sheriff Danny Oliver were shot and killed in 2014 by Luis Enrique Monroy-Bracamonte—an illegal alien gang member with multiple deportations. Their names were memorialized in the 114th Congress by the Davis-Oliver interior enforcement bill, which aims to increase cooperation between federal and local officials in the enforcement of U.S. immigration laws.

Specifically, the Davis-Oliver bill would provide local law enforcement the crucial resources they need to be part of the solution to illegal immigration, while imposing meaningful penalties against local governments that persist in obstructing immigration enforcement. By ensuring seamless cooperation between ICE and local law enforcement, the bill recognizes that U.S. immigration laws exist to protect the safety and security of the American people and that all law enforcement agencies, as well as state and local governments, have a sworn obligation to work together to see that those laws are carried out.

While the Davis-Oliver bill is yet to be introduced in the current Congress, President Trump voiced support for it on the campaign trail and would likely sign it into law if it landed on his desk.

Another special guest of President Trump and the First Lady is Jamiel Shaw, Sr., whose son, Jamiel Jr., was gunned down by an illegal alien, who was also a gang member, in 2008.

It is worth nothing that the murders of Michael Davis, Jr., Danny Oliver, and Jamiel Shaw Jr. were a direct consequence of the sorts of policies that the Davis-Oliver bill seeks to end. They are among the thousands of Americans who have suffered needless, preventable tragedies at the hands of criminal aliens who the previous administration refused to remove from the country, or who have been shielded from removal by local sanctuary policies.

President Trump’s address is set for tonight at 9:00 PM, ET and can be streamed here.