By Steve Holland WASHINGTON, May 15 (Reuters) - President Donald Trump is pursuing an ambitious remaking of Washington, from a $400 million White House ballroom to a 250-foot arch and a renovated Kennedy Center.

The costly Reflecting Pool project is getting attention as congressional Republicans seek to add $1 billion for Trump’s sprawling White House ballroom.

Experts say the move that would allow the administration to bypass a lengthy public bidding process is unusual because the site is not part of the White House complex.

A gunman’s attack at the April dinner has spurred more debate than usual about one of Washington’s most dissected rituals.

The White House briefly locked down after the shooting a few blocks away on the National Mall.

The Senate is returning to Washington to resume work on funding immigration agencies with a package that includes $1 billion for the renovation of the White House East Wing.