President Donald Trump will use his executive authority Wednesday to jump start construction on his proposed U.S.-Mexico border wall - one of his signature campaign promises. 

  • Trump to use executive authority to jump starter border wall
  • US-Mexico border wall was a signature campaign promise
  • Trump to meet with Mexican president next week, discuss border wall costs
  • Trump to also weigh details on curbing refugees from entering US

According to administration officials, Trump is also expected to target so-called sanctuary cities and potentially restrict the flow of refugees to the United States. 

Trump first tweeted out his plan Tuesday night: 

Trump's promise to build a wall is what energized his supporters throughout the race for the White House. 

"On day one, we will begin working on an impenetrable, physical, tall, powerful, beautiful, southern border wall," said the former reality TV star and real estate giant. 

And in the first week of his presidency, Trump is poised to begin delivering on that promise. 

White House Press Secretary Sean Spicer commented Tuesday on Trump's plans.

"Today's announcement is just the beginning of what's set to be a multi-day roll out of immigration actions by the president," Spicer said.

The president is said to still be weighing the details of plans to curb the number of refugees coming to the U.S. 

The current proposal includes at least a four-month halt on all refugee admissions, as well as a temporary ban on people coming from some Muslim-majority countries, according to a source from a public policy organization that monitors refugee issues. 

Trump campaigned on pledges to tighten U.S. immigration policies, including strengthening border security and stemming the flow of refugees.

While the specifics of Trump's orders were unclear, administration officials said Wednesday's actions would focus in part on the president's plans to construct a wall along the southern border with Mexico.

Trump has insisted that Mexico will pay for construction of the border wall, but has not detailed how he plans to make that happen. 

Trump is expected to discuss the matter with Mexican President Enrique Pena Nieto when he visits the White House next week. 

Information from CNN and AP contributed to this report.