Chicken game that hedge funds have challenged?

$Direxion Daily 20+ Year Treasury Bull 3X Shares ETF(TMF.US)$ Trump had the upper hand at debates, and when it became inflated due to Trump's economic policy, bonds were shorted even though elections had never even started. Meanwhile, indicators of economic slowdown are announced every day, and until when can we work hard at short selling? The Biden camp will also bounce back, and it is difficult to sell in depth, so if 10-year bonds reach the latter half of 4%, it may be okay to consider buying more