US President Donald Trump has blocked attempts by a Chinese state-owned firm to acquire an American semiconductor manufacturer. He blocked the attempt saying acquisition of semiconductor manufacturer posed a threat to US national security.<br/><br/>A Treasury Department in a statement said yesterday that the acquisition of Lattice Semiconductor Corporation, a publicly-traded Oregon company, by Chinese-owned Canyon Bridge Fund could endanger the US government's use of sensitive products the company produces.<br/><br/>The Trump administration has adopted an aggressive stance towards China on trade and national security matters, launching wide-ranging investigations into the national security ramifications of Beijing's trade in aluminium and steel.