“With the two smashes ‘Along Comes Mary’ and ‘Cherish,’ The Association became one of the hottest new bands of 1966, the singles charting at #7 and #1 respectively,” (RichieUnterberger.com). “It was no surprise that their debut album, featuring both of those songs, was also a big success, rising to #5 and remaining their highest-charting LP ever, with the exception of their Greatest Hits compilation.
… With its dynamic interplay between (the) lead and the rest of the band’s vocal harmonies, as well as an intriguing lyric that jammed about as many syllables as were possible to fit into individual lines of a pop song in 1966, the song took a few months to catch on nationally.” The single reached the top 10 in both the USA and Canada.
The intro and (very short!) verse are in A minor. The first section of the chorus, heard for the first time at 0:31, shifts to A mixolydian. By 0:52, the end of the chorus has reverted to A minor. Another verse starts at 1:05 and the pattern continues.