Federal Reserve chair Jerome Powell managed to smooth some election-ruffled feathers in bond markets on Tuesday, helping Wall St stocks back to all-time highs as a sweep of labor market soundings are due ahead of the July 4 break. U.S. Treasuries, which had been hit earlier this week by rising bets on Donald Trump's return to the White House and the fiscal implications of his campaign promises, have calmed somewhat since Powell spoke in Portugal on Tuesday. Ten-year yields have slipped back to 4.43% from peaks close to 4.5% set on Monday - when betting markets pushed former President Trump's chances of beating incumbent Joe Biden in November to more than 60% after Biden's dire TV debate performance last week.