Tangentially related, I don't get why there isn't more talk about Congress overriding Trump's veto to reopen the government. Both parties seem to want it, you would think a 2/3 supermajority in both houses would be attainable.
A vote like that won't happen unless the leaders of both the House and Senate allow it. The House Speaker would definitely permit the vote, but McConnell has said he won't allow anything the President would veto. https://www.politico.com/story/2019/01/04/mcconnell-governme...
McConnell doesn't want to rock the boat by bypassing Trump's veto. He has a re-election campaign in 2020 and if he angers Trump now, he might get primaried by another Republican, similar to what happened to several politicians in the 2018 race.