Voting a straight ticket is anything but straight in this country.
In North Carolina, if you're voting a straight-party ticket, you must vote separately for the president. If you don't, you risk your vote for president not being counted.
In Texas, Alabama and South Carolina, voting a straight-party ticket includes the president. Email rumors, of course, say otherwise.
Be very careful this election season, my darlings. Don't believe everything you read in emails, READ YOUR BALLOT'S INSTRUCTIONS, and try to read up on your state's laws before you cast your vote.
I don't know why the Republicons are so gung-ho about suppressing votes when the bloody state-by-state variation in rules does the job all by itself...