By Laura Sanicola NEW YORK (Reuters) – U.S. fuel retailers are fighting the inclusion of a tax credit for sustainable aviation fuel (SAF) in Democrats’ $430 billion spending bill, arguing SAF is more carbon intense and less efficient than renewable diesel. Lawmakers are offering a $1.25-$1.75 per gallon SAF credit depending on the feedstock used, as part of a tax and climate bill that aims to lower U.S. carbon emissions by about 40% by 2030 and cut the federal budget deficit by $300 billion. The bill is expected to pass the Senate and move to the House with the SAF credit included next week. D…