US President Donald Trump has signed an executive order launching a probe into possible voting irregularities in past presidential elections. The order, signed yesterday, calls for the establishment of the Presidential Advisory Commission on Election Integrity, with Vice President Mike Pence serving as its chair. The commission is tasked with studying the registration and voting process used in federal elections and is expected to report back to the President.<br/><br/>The move is widely seen as part of Trump's efforts to defend his claim that voting fraud kept him from winning the popular vote in the 2016 election. He has alleged that millions of illegal immigrants fraudulently cast ballots for his Democratic rival Hillary Clinton. But he has submitted no concreate evidence for these allegations, causing even some Republicans to question his motives.<br/>Trump also signed another executive order to bolster the cyber security of federal networks and critical infrastructure. The step was taken to address possible cyber attacks by foreign countries such as Russia, China and Iran.