I'm betting you already understand that consensus in other countries does not support making a law here, so I won't argue that point.
I did not have a cite; I made an educated guess. Ben Franklin proposed it, but I had heard nothing about it prior to the 20th century, and couldn't recall even vaguely when it might have been started. However, I could just see a buncha Maine or Iowa farmers' reactions to being told what time it was, as if a government dictate would affect when then they got up to milk the cows or went to bed. Remember that even into the 20th century America was predominantly a rural nation. That is an awful lot of rural folks being told when to get up or go to bed in a sense. Plus, I had never heard of any such thing--a consensus of setting clocks front and back twice a year. This last, coupled with my estimation that a population would just never make that tradition on their own were what decided it for me.
However, a quick google turned up a wiki article. Just as one might suspect, DST was sufficiently unpopular that Congress abolished it after WWI. "Unpopular" equals no consensus, or rather it equals consensus running the other way: against.
http://en.wikipedia.org/wiki/Daylight_saving_time_in_the_United_States
Even so, consensus or not, shifting is not measuring. Even if a majority of US citizens wanted DST, Congress has no authority under the weights and measures clause. Only if one stretches the commerce clause all out of shape can one plausibly assert congress has commerce authority.
Now, before anybody comes back and points out "the wiki article says the transportation industry requested federal law for uniform time zones" and "the standard for changing an area of the country from one time zone to another is convenience of commerce" let me point out that there is a difference between setting a time zone under commerce clause authority, and shifting the time around twice a year. One might as well say there is no human activity that is out of reach of the commerce clause if a connected something comes in reach just because the first something was found to be within reach.