Just like Lamar! and Donnie Scumquist.
No conservative will ever defend Don Sundquist, at least in public.
However, Lamar Alexander got a score of 92 in 2004 and 88 in 2005 from the American Conservative Union and since he has been in office he has voted pro-life in 23 of 24 issues according to National Right-to-Life (the one negative mark was voting for stem cell bill that Bush just vetoed).
You may have issues with Lamar prior to him being a US Senator. But how could a fair-minded conservative take issue with his record since he took office?