Great question. In metonymy, the thing substituted isn't really a part of what you're talking about (“the suits in the corporate office”, or “I lost money at the track”), you have to mentally substitute an evocative thing, so Ds think metonymy since the wall isn’t part of actual enhanced border security.
Republicans, on the other hand, think it's a small part representing the greater whole (“cash or plastic?”, or “nice set of wheels”), so they think synecdoche.
And when you can’t even agree on the basics, you have little basis for negotiation.
WaPo:
Democrats Try to Box In Trump With Plan to End Government Shutdown Without Wall Funding
By splitting off the homeland security bill, Democrats are opening the door to a month of negotiations. But they are also essentially daring Mr. Trump and Senator Mitch McConnell, Republican of Kentucky and the majority leader, to keep a big chunk of the government shuttered over the president’s demand for the wall. Senator Chuck Schumer of New York, the Democratic leader, and Representative Nancy Pelosi of California, who is expected to be sworn in as speaker on Thursday, challenged Republicans in a joint statement on Monday.
Both Republicans and media will need to adjust to the new reality.
NY Times:
House Democrats ready strategy to reopen government, deny Trump wall money
GOP leaders in the Senate said they would support only a proposal that has the president’s backing. And without additional wall money, the Democrats’ offer is unlikely to break the stalemate that has shuttered large parts of the federal government since Dec. 22.
But the strategy Democrats announced Monday would usher in a new era of divided government in Washington with a dare to Trump, aimed at forcing him and Senate Republicans to take their deal or prolong a partial government shutdown.
House Democrats plan to use their new majority to vote through measures that would reopen nearly all of the shuttered federal agencies through the end of September, at funding levels Senate Republicans have previously agreed to. Those spending bills contain scores of priorities and pet projects for lawmakers on both sides of the aisle.
Erik Wemple/WaPo:
Finally, a note on contributor hygiene. Fox News pays contributors, not to mention anchors — Hannity and “Fox & Friends” (though things are changing there) — to defend Trump’s “policies” as well as his misanthropic behavior. Starting in the presidential campaign CNN brought on certain contributors — Jeffrey Lord, Kayleigh McEnany, Scottie Nell Hughes, Paris Dennard (all of whom are no longer with the network) — to do likewise, with embarrassing and anti-journalistic results. MSNBC has sidestepped this brand of clown time by airing the comments of conservative contributors principled enough to bash Trump — like Charlie Sykes, Bret Stephens and George Will — or at least principled enough to publicly agonize over Trump — like Hugh Hewitt. Another emphasis has fallen on reporting; MSNBC has eased up on the I-can-comment-on-any-topic! punditry and commonly hauls in whatever reporter has a big story for that particular day.
Reporting helps with programming decisions, too. When Wallace steered clear of Trump’s falsehood-ridden immigration speech in early November, according to an informed source, she had done some reporting to determine that the president wasn’t going to make any grand announcements. Just falsehoods, as it turned out.
NY Times:
NASA’s New Horizons Spacecraft Signals Successful Flyby of Ultima Thule, the Most Distant Object Ever Visited
Now scientists await pictures and a bounty of new data about a small, mysterious icy body four billion miles from Earth.
Politico:
How Trump Got Bad at Twitter
Once he ruled the medium, but read his feed now and you can see something has gone very wrong
But if you still think of Trump as the tweeter-in-chief, master of the pithy insult and well-placed exclamation point, just visit his feed. The crisp, unpredictable tweets from the start of his presidency have largely become rambling and verbose. His account is weirdly turgid, loaded with ponderous attacks on his perceived enemies and obscure multi-part arguments about his legal situation. At other times, it veers as close as Trump has ever sounded to Washingtonesque.
NBC News:
Millions of U.S. workers to see higher pay from minimum-wage hikes in 2019
"Fifteen dollars an hour has become the new minimum wage, meaning that that’s to afford the basics," one employment-law expert said. "It’s just a start."
Eight states — Arizona, California, Colorado, Maine, Massachusetts, Missouri, New York, and Washington state — are phasing in increases that will eventually put their minimum wages at $12 to $15 an hour, according to the National Employment Law Project (NELP), a nonprofit that advocates for higher minimum wages.
Sarah Binder (policy expert):
Some thoughts on politics of government shutdown & how these sorts of deadlocks have been resolved in the past. Do past patterns apply to Trump? Not entirely clear. But dynamics of past stalemates should still be helpful in thinking through how the impasse might be resolved.
In a polarized and partisan era, avoiding blame is key to propelling parties to the bargaining table. Parties are less interested in the benefits of "getting to yes." They are more often compelled by the costs of continuing to say "no."