Friedrich Merz, the head of Germany’s opposition Christian Democrats (CDU), is discouraging voters from supporting the pro-business Free Democrats under the country’s two-vote system, despite their potential as a coalition partner. German ballots contain two votes, one for a directly elected local representative and another for a party list. Voters can split their votes between different parties for tactical reasons. Speaking ahead of likely snap elections early next year, in which the CDU is the clear frontrunner, Merz said the party would not entertain giving assistance to the FDP, which is …