Not sure what that signal is but he is sending one.
Check it out:

President Obama will arrive in Saudi Arabia on Tuesday to send a signal of U.S. support and reassurance for the kingdom after the death of King Abdullah.

The trip — which will cut short the president’s visit to India — comes as the Saudis face deep security uncertainty on multiple fronts, and amid some tensions with the Obama administration.

The president’s visit, the White House says, is primarily intended to pay respects to Abdullah, who died on Thursday. But aides also made clear that Obama would use the opportunity to discuss top policy matters with the country’s new ruler.