Trump says shutdown may continue “a long time”

Is that a threat?

During today's back-from-the-holidays meetings, Donald Trump said the United States “Government could be shut down for a long time...as long as it takes.”
Hang on now.
As long as it takes for what?

Trump says government could be shut down for a “long time”
— Jeff Mason (@jeffmason1) January 2, 2019

#GovernmentShutdown could last "a long time," @POTUS tells reporters.
— Steve Herman (@W7VOA) January 2, 2019

#BREAKING Trump warns government shutdown could last "a long time" pic.twitter.com/2EDle5NqMB
— AFP news agency (@AFP) January 2, 2019

BREAKING: @realDonaldTrump just said "Government could be shut down for a long time...as long as it takes." The Dow was up around 60 pts when he said it, now up 32. 3pET he will be starting a meeting w/ Congressional leaders, we're LIVE at the WH
— Liz Claman (@LizClaman) January 2, 2019

Trump at cabinet mtg on partial gov't shutdown: It could be a long time..it could end quickly
— Chad Pergram (@ChadPergram) January 2, 2019