Analysts warn that pro-Israel groups and politicians in Washington will likely push to derail diplomacy with Tehran.

Marshall's take echoes Trump's position. The president said he could be on board with Iran having some ballistic missiles in a final deal.

Sen. Roger Marshall (R-Kan.) echoed President Donald Trump's latest stance in suddenly arguing Iran has the right to develop ballistic missiles for its defense.

Analysts warn that pro-Israel groups and politicians in Washington will likely push to derail diplomacy with Tehran.