US President Donald Trump today vetoed a bill passed by the Congress to end US military assistance in Saudi Arabia's led war in Yemen.<br />''<br />''<br />''In a break with the president, Congress voted for the first time to invoke the War Powers Resolution to try and stop US involvement in a foreign conflict. The veto- the second in Trump's presidency- was expected.<br />''<br />''<br />''<span style="color: #222222;">Trump issued his first veto last month on legislation related to immigration.</span><br />