“Seem to be fine”? On what basis do you draw that conclusion? Republicans lost Congressional majorities in 2007, about the same time the problems with Americans wrongly on the no-fly list were appearing. What could Republicans have possibly done about it, with Democrats holding the Congress and the White House? It’s Obama’s agencies that are controlling the Watch List, not Republicans.
But now we have a chance to bring proper due process to the Terrorist Watch List, as our Constitution requires. Why are Democrats fighting that? With proper due process, gun control over those on the Watch List can be devised. Again, why are Democrats fighting that?