What to watch for on the campaign trailIn one of many high-profile down-ballot primary races today, Rep. Lauren Boebert of Colorado won in a crowded Republican field after switching districts, NBC News projected, and progressive Rep. Jamaal Bowman of New York lost his race against Westchester County Executive George Latimer, a centrist, in a contest that attracted the most ad spending ever for a House primary.President Joe Biden and former President Donald Trump are preparing this week to face off in Thursday's CNN debate, their first since 2020.The judge in Trump's hush money trial lifted parts of his gag order. New York state Judge Juan Merchan said Trump is now free to publicly discuss witnesses and jurors in the case but is still prohibited from mentioning individual prosecutors, court staff members or family members.Trump could announce his running mate pick as early as this week, possibly ahead of the debate, according to four people familiar with the situation.