Why strace sudo command bombs when sudo command works?

Question

my username is allowed to execute

sudo command

then why does this bomb

strace sudo command

with the error:

sudo: must be setuid root

Answer 1

The "must be setuid root" is caused by running sudo in strace.

From man strace:

BUGS Programs that use the setuid bit do not have effective user ID privileges while being traced.

If you want to strace setuid things and have the setuid bit honored, you have to run strace as root with the -u option (this question has already been submitted : Strange strace and setuid behaviour: permission denied under strace, but not running normally)