It doesn't make any sense to do that at this point.
Portland signed him to a 2-yr minimum deal last year. After the '18-'19 season, Portland will have his "Early Bird" rights.
http://www.cbafaq.com/salarycap.htm#Q25
So Portland will be able to pay him slightly more than the regular MLE.
To do anything different, Portland would have to cut Baldwin ***let him clear waivers*** and then re-sign him. At this point, the risk of him not clearing waivers is very high. I'm sure there would be at least 1 team out there that would claim Baldwin on his minimum contract - leaving Portland high & dry.