The Note's Must Reads for Wednesday July 4, 2012 Compiled by ABC News" Carrie Halperin, Amanda VanAllen, Jayce Henderson and Will Cantine ABC News" Emily Friedman: "Mitt Romney's Vacation Includes Meeting With Senior Advisers" It wasn't all beach volleyball and water sports for Mitt Romney today. The Washington Times" Seth McLaughlin: "GOP waits for Romney to pick "tax" or "penalty"" A semantic dispute over what defines "a tax" or "a penalty" has pushed Mitt Romney's presidential campaign deeply off message as he struggles for the right response to last week's Supreme Court ruling upholding the health care law. The Hill's Justin Sink and Jonathan Easley: "GOP damage control after Team Romney definition of mandate" Republicans sought to do damage control for GOP presidential candidate Mitt Romney on Tuesday after a senior adviser's tap-dance on the healthcare mandate. New Jersey Gov. Chris Christie in an appearance on Fox News suggested Romney adviser Eric Fehrnstrom misspoke when he called the mandate a penalty and not a tax, while other Republicans suggested Fehrnstrom's comments were merely a trial balloon. The Washington Post's Nia-Malika Henderson and Karen Tumulty: "Mitt Romney supporters fight calls for campaign staff shake-up" Supporters of Mitt Romney are pushing back against calls for a campaign shake-up from Rupert Murdoch and Jack Welch, two industry titans who recently took to Twitter to advise the Republican presidential candidate to dump his staff. Murdoch was among 50 people who met with the former Massachusetts governor at the Union League Club in New York City on Thursday afternoon. The New York Times" Jegg Zeleny: "Possible No. 2 to Romney Knows Ways of the Capital" He has played the role of Hillary Rodham Clinton, Al Gore and Barack Obama. He has spent hours studying intricate details of their policy positions, perfecting the cadences of their voices and refining the lines of attack against their Republican opponents. For more than a decade, Senator Rob Portman, Republican of Ohio, has deployed an unusual expertise: impersonating Democrats to help candidates in his own party prepare for debates. "Obama's Swing State Voters Rate 2012 Race" LINK