KABUL, Afghanistan (AP) — Barack Obama visited Saturday with U.S. troops and Afghan officials in this war-weary nation, which is the focal point of his proposed strategy for dealing with threats to the U.S. if elected president.

While officially a part of a congressional delegation on a fact-finding tour expected to take him to Iraq, Obama was traveling Saturday amid the publicity and scrutiny accorded a likely Democratic nominee for president rather than a senator from Illinois. Security was tight and media access to Obama was limited by his campaign, and his itinerary in the war zones was a closely guarded secret.

Obama, dressed in light khaki colored trousers and a checkered shirt with his sleeves rolled up, and others in the delegation received a briefing inside the U.S. base in Jalalabad from the Afghan provincial governor of Nangarhar, Gul Agha Sherzai, a no-nonsense, bullish former warlord.

‘‘Obama promised us that if he becomes a president in the future, he will support and help Afghanistan not only in its security sector but also in reconstruction, development and economic sector,’’ Sherzai told The Associated Press.