A series of weak auctions for U.S. Treasurys are stoking investors’ concerns that markets will struggle to absorb an incoming rush of government debt. ... inflation not tamed ... Federal Reserve will leave interest rates at multidecade highs for .. years to come. The 10-year yield—the benchmark for borrowing rates on everything from mortgages to corporate loans—finished the week around 4.5%... At the same time, the government is poised to sell another $386 billion or so of bonds in May—an onslaught that Wall Street expects to continue no matter who wins November’s presidential election. While few fear a failed auction—an...