US President Donald Trump said Monday he is "all alone (poor me)" in the White House amid stalled negotiations for a deal to end a partial government shutdown, now in its third day.

"I am all alone (poor me) in the White House waiting for the Democrats to come back and make a deal on desperately needed Border Security. At some point the Democrats not wanting to make a deal will cost our Country more money than the Border Wall we are all talking about. Crazy!" the president wrote on Twitter.