WASHINGTON (CNN) -- On the same day "Law and Order" star Fred Thompson inched one step closer to a presidential run, the former senator was on a popular conservative Web site slamming the Palestinian group Hamas and calling on the world to do more to stop Iran's nuclear program.

Writing on Townhall.com Wednesday, Thompson wrote "Israel is at war" with "Islamofascist extremists" launching rockets into Israel from Gaza. He also writes that "If the world doesn't act to stop Iran's nuclear ambitions, it must be prepared for the consequences of Israel defending itself."

Thompson has made blogging a hallmark of his nascent presidential bid, and he has strong support online among conservatives disenchanted with the three GOP frontrunners. He told USA Today yesterday that the Internet "has allowed me to be in the [presidential] hunt, so to speak, without spending a dime."

Along with Iran and Israel, Thompson has blogged about his lymphoma, the Virginia Tech shootings, and the NFL draft. Thompson also recorded a widely-distributed web video earlier this month during his face-off with filmmaker Michael Moore over Cuban health care.