The benchmark Treasury yield was flat on Monday as Washington ramped up its criticism of China over the origin of the coronavirus pandemic.
U.S. Secretary of State Mike Pompeo on Sunday stepped up the administration's claims that China intentionally concealed the severity of the outbreak in its infancy, while suggesting that there was "a significant amount of evidence" of the coronavirus originating in a Wuhan lab. However, he did not contest scientists' conclusions that it was not man-made.
The comments came after President Donald Trump indicated that the initial trade deal signed between Washington and Beijing in January was now of secondary importance following China's role in allowing the outbreak to spread.
The escalating tensions between the world's two largest economies has offset cautious optimism over the gradual reopening of economies following weeks of shutdowns around the world, as the rate of new cases and fatalities slows in Europe and the U.S.
Cases in the U.S. have now topped 1.15 million, resulting in more than 67,000 deaths, according to Johns Hopkins University.
Economic data on Monday showed factory orders in March declined 10.3%, worse than expectations. It was also the largest monthly drop on record.
Auctions will be held Monday for $61 billion of 13-week Treasury bills, $50 billion of 26-week bills and $30 billion of 105-day bills.