5) Crossroads GPS is launching a $7.2 million ad blitz Wednesday in five key Senate races: Missouri, Montana, North Dakota, Nevada, and Virginia. 4) Two tough new ads in the presidential race: Mitt Romney and the RNC are up with a commercial saying President Obama "quietly announced a plan to gut welfare reform by dropping work requirements." The Romney campaign believes Obama is vulnerable on the welfare issue -- Newt Gingrich famously called him the "food stamp president" during the campaign -- so expect to hear this line of attack more on the campaign trail. Priorities USA has a new brutal ad featuring a former employee at GST Steel, who talks about losing his job and health benefits -- and his wife's illness -- after Bain Capital closed the steel plant. 3) The New York Times highlights single women as potential swing voters this year. The Times: 2) Four more Republicans were announced Tuesday as GOP National Convention speakers: former Pennsylvania Sen. Rick Santorum, former Florida Gov. Jeb Bush, Kentucky Sen. Rand Paul and Oklahoma Gov. Mary Fallin. 1) Voters go to the polls in Missouri, Michigan, Washington State, and Kansas Tuesday. Check out our previews of the Missouri GOP Senate primary here, Michigan GOP Senate primary here, and Michigan/Missouri House primaries here. And stay tuned to Hotline on Call for full results tonight.