WASHINGTON (AP) — The first tangible signs of movement may be emerging in the impasse that has shut down the government for weeks: President Donald Trump is promising a "major announcement" about the closure and the U.S.-Mexico border and Democrats are pledging more money for border security.It was unclear whether the developments, following days of clashes between Trump and House Speaker Nancy Pelosi, D-Calif., might represent serious steps toward resolving the partisan [...]