Three of the four top contenders for the Republican nomination for Congress in the seventh district have made substantial contributions to their campaigns. State Sen. Leonard Lance has loaned $100,000 to his House campaign – nearly one-third of the $294,130 he has raised so far. Former Summit Council President Kelly Hatfield, who has the organization line in Union County, loaned her campaign $55,813 – more than half of the $106,293 she’s brought in so far. Scotch Plains Mayor Martin Marks has raised $123,340 – which includes a $75,000 personal loan. Kate Whitman has raised $434,283, which includes a personal contribution (not a loan – that means she can’t get it back) of $4,600.