BG 8:52
LAT 8:15
PI 7:32
CS 3:07
(updated at 11:50 Sunday morning)

- HA[IL] TO THE C[HI]EF is the [Song with the lyric "We salute him, one and all].
- A[ME][RI][CA]N [FL]AGS are [Patriotic displays] with four hidden state abbreviations.
- The chief justice of the Supreme Court swears in the president. J[OH][N J]AY was the nation's [First U.S. chief justice].
- The O[VA]L OFFICE is a [White House tour highlight].
- Many a [Political insider] was a [CO][NV]ENTION-GOER.
- HIP-HOP feels fresh in the grid. The clue is the straightforwardly synonymous [Rap].
- E[NC]HASE is clued [Set, as a gem]. Raise your hand if this word was unfamiliar to you, too.
- [Wyoming Senator Mike] ENZI is a bit thematic, I guess. I needed all the crossings to identify him.
- [Green's songwriting partner in old musicals] was Betty CO[MD]EN—again, didn't know her, used the crossings. (Thanks for the ID, Zulema.) David Kahn isn't known for being an easy constructor, after all. I hope everyone working this puzzle knows Comden or the Internet Movie Database, I[MD]B. the [Popular film Web site, briefly] because if they don't, ouch.
- The crossword clue [Organic compounds] screams ENOLS, doesn't it? Ah, my old crosswordese friend. I knew I could count on you.
- My favorite clue is [Record holder?] for a FELON.
- [Like many campgrounds at night] clues FIRELIT. And here I was trying to choose between MOONLIT and STARLIT.
- THE DEAD is a noted [James Joyce short story]. Snow, anyone? I have plenty.
- [Nobel physicist Tamm] is named IG[OR]. Another only-through-the-crossings answer for me.
- I don't know my [Old German rocket]s at all. This one's a [V-T]WO.
- [Country singer Black] is named CL[IN]T. In the NYT applet, I typed only the first letter of each state abbreviation in the circled square, leaving a little surprise in that completed puzzle.
- Some [Numbers?] numb you up: OP[IA]TES.

Updated:

- My favorite is "YOU LOOKIN' AT ME?"—[Fightin' words].
- [Dieter's dairy choice] is LOW-FAT MILK. I hesitated on the beginning—NONFAT or LOWFAT?
- [Regardless] clues COME WHAT MAY.
- E FLAT MINOR is the [Key of Prokofiev's Symphony No. 6].
- They ask "Who is THAT MASKED MAN?" about [The Lone Ranger, after riding off].
- MEERKAT MANOR is an [Animal show set in the Kalahari]. I haven't seen this. Is it fun?
- [Quicker picker-upper?] of..."your vocal fold vibrations (phonation)" is a THROAT MIKE (or mic, short for microphone). I had no idea. Does everyone else know about these things?
- MEAT MARKET is clued as a [Chop shop?].
- BAT MASTERSON was a [Friend of Wyatt Earp].

- FEED MCMAHON is clued [Don't let an announcer starve]. If you missed the news last year, it was Donald Trump who stepped in with an offer to bail out Ed McMahon.
- [Hitcher's punisher?] is FERULE OF THUMB. Hook's not afraid to toss in a vocabulary word to make a theme entry work. (A ferule is a flat ruler intended for hitting children (really! the dictionary says so), and a ferrule is the metal tube that anchors the eraser to a pencil.)
- Speaking of high-end vocabulary, FEOFF BROADWAY is a [Feudal estate in NYC?]. I suspect feoff = fief, but I haven't seen that spelling before. One could argue that it's too obscure for a Sunday crossword, but I think it works here.
- [Genetic cause of campiness?] clues FEY CHROMOSOME, building on "Y chromosome." Cute!
