HARRISBURG, Pennsylvania — Mediocre candidates, lackluster fundraising, self-inflicted wounds. Squint hard enough and you might catch remnants of the three political hurdles, or some combination thereof, that once conspired to derail Republican efforts to win control of the Senate and help Democrats avoid the midterm elections curse.Now with Election Day around the corner, polls are suggesting a return to convention. Voters are poised to punish the party in power in the White House amid intense dissatisfaction with President Joe Biden and rising anxiety over the economy and public safety. That is putting Republicans on the precipice of winning a majority in the Senate after a late summer and early fall of doubt, doubt, doubt. And with the House already long since leaning toward a GOP takeover, Democrats on Capitol Hill are staring down the barrel of a complete and total sweep.MIDTERMS 2022 LIVE: UPDATES FROM THE CAMPAIGN TRAIL AHEAD OF CRUCIAL ELECTIONLeading the Republican Senate surge, at just the right time, is Dr. Mehmet Oz, renowned heart surgeon and famous television personality and the GOP nominee here in Pennsylvania.Oz was on the cusp of overtaking Lt. Gov. John Fetterman (D) as the calendar turned from October to November after trailing in 21 of 22 public opinion polls since early June, which would keep this pivotal open seat, in a critical swing state, in GOP hands. That was how the Pennsylvania Senate race looked before Oz...