President Donald Trump’s administration will convene a meeting of at least 15 federal agencies Thursday as a first government-wide step toward crafting the president’s $1 trillion infrastructure initiative, a senior White House official said. Gary Cohn, director of the National Economic Council, will lead the meeting, which will focus on identifying new projects that would boost the economy; finding existing projects, such as the Keystone XL pipeline, that could be expedited; targeting policies, outdated rules and laws that could delay projects; and developing funding and financing options, the official said.