If your commissioner on nfl.com fantasy can others still block your trade?

I'm the commisioner and the trade is Shiancoe For Greg Olsen it's not out of line, Olsen is a hair better but oh well. 3 people have already objected I just want to know if they can make the trade not go through because I know I usually have the power when it goes to four objections to approve or reject the trade but in this case i don't know